Abstract: Traditional testing method of mine-used equipment on/off transducer needs three-phase AC power supply and electric fires or bulbs with large power to get current for transducer acting, which cannot get continuously adjustable current with complex wiring and low efficiency. For above problems, the paper proposed a design scheme of test tooling of mine-used equipment on/off transducer, gave design demands, and introduced composition and main circuits of the test tooling in details. The testing result of a mine-used equipment on/off transducer showed that the test tooling can generate continuously adjustable current with simple and efficient operation, and can be calibrated through qualified clamp meter for correctness and traceability of testing data.