Due to the high dynamic applications of the piezoelectric actuator in the fields of internal combustion engine fuel injection and fine electrical discharge machining etc.,the higher frequency response and output power are demanded.In this paper,a new high dynamic bridge high power piezoelectric amplifier is developed.The bridge output is designed,a power conversion rate and the output power are doubled, and the output bandwidth is of 10 kHz.Direct Digital Synthesizer(DDS) technology is applied to achieve the sine, triangle,sawtooth and square wave output.