The invention discloses a static load test bench of overload couplers. The static load test bench of the overload couplers comprises a drive mechanism, a test mechanism and a work piece placement mechanism, wherein the drive mechanism is connected with the test mechanism through the work piece placement mechanism, the drive mechanism comprises a flat plate, a drive force arm, two hydraulic cylinder components, a drive end bottom seat and a drive shaft component, the two hydraulic cylinder components are both fixed on the flat plate, and connected with the drive force arm, the drive shaft component is fixed on the drive end bottom seat and connected with the drive force arm, the drive end bottom seat is fixed on a bottom plate, the test mechanism comprises a flat board, a test force arm, two force sensor components, a test end bottom seat and a rotation shaft component, the two force sensor components are both fixed on the flat board, and connected with the test force arm, the rotation shaft component is fixed on the test end bottom seat, and connected with the test force arm, and the test end bottom seat is fixed on the bottom plate. The static load test bench of the overload couplers is suitable for the couplers of various weights, and particularly suitable for a torque test and tests of parameters of static torsion strength and the like of heavy load couplers and the overload couplers.