The large size crankshaft connecting rod structure water pump can be used for high pressure cleaning system which needs large flow rate, such as road cleaning vehicle. This is a completely new design pump, flow per minute, piston diameter, stroke, speed, pressure, flow, power, weight, volume can reach 150 L, it is designed to high speed, to ensure good performance and longer service life. Pump body follows the conventional design, crankshaft using high-strength, model mm mm rpm MPA L/min kW import, export kg steel. And with two super-large tapered roller bearings for support.