Hydraulic drive auxiliary power generation system for vehicle

The invention discloses a hydraulic drive auxiliary power generation system for a vehicle. The system is used for the vehicle, an auxiliary hydraulic pump is driven through a water-air intercooling diesel engine, constant output flow is guaranteed through control of a throttling valve block set and an overflow valve block set, an auxiliary motor is driven to rotate at a constant speed, and then an auxiliary generator is driven to operate constantly, so that the function of auxiliary power generation can be achieved for the vehicle; and when an electromagnetic reversing valve is not powered on, hydraulic oil output by the auxiliary hydraulic pump can directly return to a hydraulic oil tank through the electromagnetic reversing valve without passing through the auxiliary motor, so that the overload protection function is achieved. The hydraulic drive auxiliary power generation system for the vehicle is highly integrated, small in size and high in starting speed. After the hydraulic drive auxiliary power generat