In order to overcome the complicated structure of hydraulic retarder and serious thermal recession problem of braking torque of eddy current retarder, a double stator liquid-cooling retarder (DSLR) structure was proposed. The electromagnetic field model was calculated by using magnetic circuit method. The electromagnetic field intensity distribution, air gap flux density and braking 〖JP2〗characteristics were analyzed by using finite element method, so as to obtain the factors affecting the braking torque. The transient flow-〖JP〗thermal field was analyzed by using finite volume method, and the braking heat generation model was obtained. A 2 400 N·m prototype was designed and tested on the bench. The results show that the error between the finite element analysis results and the experiment results is within 5%. The braking torque can reach 2 520 N·m when the speed is 1 500 r/min, meeting the braking requirements of heavy-duty vehicles.