The utility model relates to a high-flow movable type trailer pump truck. The high-flow movable type trailer pump truck comprises a trailer chassis, a carriage, a diesel engine, an elastic coupling, a control box, a hydraulic clutch and a fire fighting water pump. The high-flow movable type trailer pump truck is pulled to a water source or a position nearby a fire scene by virtue of a vehicle, and water supply and fire fighting are carried out; or the high-flow movable type trailer pump truck is pulled to a low-lying area for drainage when flood happens; the diesel engine is started in a no-load way by virtue of the hydraulic clutch, then a joint clutch drives the fire fighting water pump to operate, and control is carried out by virtue of the control box according to task requirements of the fire scene or the drainage, so that the fire fighting water pump works under a certain working condition; water can be pumped or supplied by virtue of a natural water source or the water is successively supplied by virtue of other fire fighting devices and equipment, and fire extinguishing rescue and relief work are carried out by utilizing built-in or other fire extinguishing equipment. The high-flow movable type trailer pump truck can provide the water supply with the high flow being more than 150L/s so as to enable a high-flow fire fighting monitor or multiple fire extinguishing fire fighting vehicles to operate normally, or the water is directly supplied to multiple kinds of fire extinguishing equipment for extinguishing a fire, the requirement of large and medium fire scenes on a heavy intensity fire extinguishing agent is met, the high-flow movable type trailer pump truck can be pulled to the scene for carrying out the quick drainage, and insufficient points of municipal facilities are made up.