The invention discloses a hydraulic transmission device with a reversing mechanism. The hydraulic transmission device comprises a housing, wherein an input shaft, a hydraulic transmission mechanism and an output shaft are mounted in the housing, wherein the hydraulic transmission mechanism comprises a hydraulic coupler and a hydraulic torque converter, which are connected through a pump pulley shaft; one end of the pump wheel shaft is connected with a coupling pump pulley, and the other end is connected with a pump pulley; a turbine output shaft is mounted on a turbine; the reversing mechanism is arranged at the tail end of the turbine output shaft. The hydraulic transmission device disclosed by the invention can automatically implement hydraulic coupling working condition output or hydraulic torque conversion working condition output according to the vehicle velocity and the load situation of a power plant, further can shift the position of a reversing shaft to change the power transmission path, so as to change the power transmission direction; in addition, the hydraulic transmission device has the advantages of being compact in transmission structure and capable of transmitting higher power.