Device capable of outputting high-pressure liquid by small power source

The invention relates to a device capable of outputting high-pressure liquid by receiving low power, namely an elasticity driving pump, and belongs to the field of water conservancy and engineering machinery. The device comprises a power input unit, a speed reducing unit, an elasticity generating unit, a high-pressure liquid generating unit and a liquid input/output unit. The device is characterized in that: the input small torque is amplified in a high transmission ratio, the amplified torque is acted on the elasticity generating unit till instantaneous release at a certain moment, and a short-time high-speed large force is output to drive the high-pressure liquid generating unit by slow force accumulation to realize high-pressure liquid output. The elasticity driving pump can be driven by common water flow or wind force serving as a power source, does not consume power or oil, and has the advantages of energy conservation, emission reduction and environmental friendliness; when the input torque is very smal