The principle of a new type of piezoelectric fluidic generation is studied in this paper. The output of power energy of generation increases when piezoelectric chip occurs resonance, then deduce the formulas of natural frequency of piezoelectric chip and resonant cavity, this supply the theory basis for design of the generation. Piezoelectric fluidic generation has characteristics such as continuously power supply, quick activation, small volume and fine electromagnetic compatibility and so on, it has great application prospect and utility value when used as fuze ambient energy resource.