Report of Foreign Issuer Pursuant to Rule 13a-16 or 15d-16 (6-k)

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 OF

THE SECURITIES EXCHANGE ACT OF 1934

For the month of July 2021

Commission File Number: 001-36206

BIT Mining Limited

Units 813 & 815, Level 8, Core F,

Cyberport 3, 100 Cyberport Road,

Hong Kong

(852) 2596 3068

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

Form 20-F x Form 40-F ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ¨

Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes ¨ No x

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): N/A

TABLE OF CONTENTS

SIGNATURE

EX-99.1

EX-99.2

EX-99.3

EX-99.4

TABLE OF CONTENTS

Exhibit 99.1 – Loto Interactive Limited Audited Consolidated Financial Statements for the Two Years Ended 31 December 2019 and 2020

Exhibit 99.2 – Blockchain Alliance Technologies Limited Combined Financial Statements As of December 31, 2019 and 2020 and For the Years Then Ended

Exhibit 99.3 – Unaudited Pro Forma Combined Financial Information

Exhibit 99.4 – Risk Factors

SIGNATURE

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