The invention discloses a pin-insertion type piezoelectric transformer shell, which is widely used for the encapsulation of round or square, radial direction or thickness vibrating type piezoelectric transformers. The piezoelectric transformer shell comprises a shell cover, a circuit board and input and output terminals; the shell cover has a box shaped structure and is hermetically combined withthe circuit board; the input and output terminals are arranged on the circuit board and connected with input and output conducting wires of the piezoelectric transformer. The input and output terminals can be insertion pins; welding parts which are used for welding the input and output conducting wires are arranged on the circuit board; the insertion pins are communicated with the welding parts; therefore, the input and the output of the transformer are led into peripheral lines through the insertion pins. The encapsulation shell has heat dissipation and protection functions, and ensures the installation and performance quality of a product.