The invention discloses a speed governor testing device which comprises a test table, a rope winding mechanism, a stretching mechanism and a shearing mechanism, wherein the shearing mechanism, the rope winding mechanism and the stretching mechanism are respectively connected with the test table; the rope winding mechanism is used for storing and placing the test rope; the stretching mechanism is used for stretching the test rope when testing to detect tension of the speed governor; and the shearing mechanism is used for shearing the test rope after the test. The speed governor testing device can automatically load and measure the speed governor, is simple in the structure, easy to operate, high in efficiency, and suitable for online detection of the speed governor batch production.