UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of August 2025

Commission File Number: 001-37385

Baozun Inc.

No. 1-9, Lane 510, West Jiangchang Road

Shanghai 200436

The People’s Republic of China

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annualreports under cover of Form 20-F or Form 40-F.

Form 20-F x Form40-F ¨

SIGNATURES

Pursuant to the requirementsof the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereuntoduly authorized.

Date: August 14, 2025

Exhibit Index

Exhibit 99.1 — Date of Board Meeting

Safe Harbor Statement

This announcement contains forward-looking statements. These statementsare made under the “safe harbor” provisions of the U.S. Private Securities Litigation Reform Act of 1995. These forward-lookingstatements can be identified by terminology such as “will,” “expects,” “anticipates,” “aims,”“future,” “intends,” “plans,” “believes,” “estimates,” “confident,”“potential,” “continues,” “ongoing,” “targets,” “guidance,” “going forward,”“outlook” or other similar expressions. Statements that are not historical facts, including but not limited to statementsabout Baozun’s beliefs and expectations, are forward-looking statements. Forward-looking statements involve inherent risks and uncertainties.A number of factors could cause actual results to differ materially from those contained in any forward-looking statement, including butnot limited to Baozun’s filings with the United States Securities and Exchange Commission and its announcements, notices or otherdocuments published on the website of The Stock Exchange of Hong Kong Limited. All information provided in this announcement is as ofthe date hereof and is based on assumptions that Baozun believes to be reasonable as of this date, and Baozun undertakes no obligationto update such information, except as required under applicable law. 

Exhibit 99.1

HongKong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement,make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arisingfrom or in reliance upon the whole or any part of the contents of this announcement.

Underour weighted voting rights structure, our share capital comprises Class A ordinary shares and Class B ordinary shares. Each Class A ordinaryshare entitles the holder to exercise one vote, and each Class B ordinary share entitles the holder to exercise ten votes, respectively,on any resolution tabled at our general meetings, except as may otherwise be required by law or by the Rules Governing the Listing ofSecurities on the Stock Exchange of Hong Kong Limited or provided for in our memorandum and articles of association. Shareholders andprospective investors should be aware of the potential risks of investing in a company with a weighted voting rights structure. Our Americandepositary shares, each representing three of our Class A ordinary shares, are listed on the Nasdaq Global Select Market in the UnitedStates under the symbol BZUN.

BaozunInc.

寶尊電商有限公司*

(Acompany controlled through weighted voting rights and incorporated in the Cayman Islands with limited liability)

(Stockcode: 9991)

DATEOF BOARD MEETING

The board of directorsof Baozun Inc. (the “Company”) will hold a board meeting on August 28, 2025 (Hong Kong time) for the purposes of,among others, approving our unaudited financial results and announcement for the second quarter and the six months ended June 30, 2025(“Results”), which are prepared in accordance with the U.S. Generally Accepted Accounting Principles and the applicablerules of the U.S. Securities and Exchange Commission, and its publication. If approved, we will announce our Results on August 28, 2025(Hong Kong time), before the opening of the U.S. market and after the trading hours of the Hong Kong market, on the website of the HongKong Stock Exchange at www.hkexnews.hk and our website at www.baozun.com.

The earningsconference call will take place at 7:30 p.m. on August 28, 2025 (Hong Kong time). Our management will be on the call to discuss the Results.

Dial-indetails for the earnings conference call are as follows:

A replayof the conference call may be accessible through September 4, 2025 by dialing the following numbers:

A liveand archived webcast of the conference call will be available on the investor relations section of our website at http://ir.baozun.com.

Hong Kong,August 14, 2025

As atthe date of this announcement, our board of directors comprises Mr. Vincent Wenbin Qiu as the chairman, Mr. Junhua Wu, Mr. Satoshi Okada,Dr. Jun Wang and Ms. Bin Yu as directors, and Mr. Yiu Pong Chan, Mr. Steve Hsien-Chieng Hsia and Mr. Benjamin Changqing Ye as independentdirectors.

* foridentification purposes only