Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors

Kadant Inc.:

We consent to the use of our report with respect to the consolidated financial statements and the effectiveness of internal control over financial reporting incorporated by reference herein and to the reference to our firm under the heading “Experts” in the registration statement.

/s/ KPMG LLP

Boston, Massachusetts

February 26, 2019