Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation in this Registration Statement on Form S-1 of our report dated August 31, 2020, of CLS Holdings USA, Inc. relating to the audit of the consolidated financial statements as of May 31, 2020 and 2019, and for the periods then ended, and the reference to our firm under the caption “Experts” in the Registration Statement.

/s/ M&K CPAS, PLLC              

Houston, Texas

June 10, 2021