The invention relates to a piezoelectric-type phone charger which comprises a shell, wherein the shell comprises a shell body, an upper end cap and a lower end cap; the upper end cap and the lower end cap respectively sleeve the two ends of the shell body; a USB (Universal Serial Bus) interface, a circuit board, an elastic slice and piezoelectric ceramic slices are arranged in the shell body; the lower surface of the circuit board is fixed to the lower end cap through a connecting rod; the lower end cap is fixedly connected at the lower end of the elastic slice; a gap is formed between the upper end of the elastic slice and the lower surface of the circuit board; the two piezoelectric ceramic slices are respectively bonded at two sides of the elastic slice; a protecting circuit, an energy acquisition circuit and a voltage conversion circuit are arranged on the upper surface of the circuit board; an output terminal of the protecting circuit is connected with an input terminal of the energy acquisition circuit; the output terminal of the energy acquisition circuit is connected with the input terminal of the voltage conversion circuit; the voltage conversion circuit is connected with the USB interface through a data line; and the upper end of the USB interface passes through the upper end of the upper end cap. The piezoelectric-type phone charger is small in volume, simple in structure, high in charging efficiency and very convenient to manufacture, carry and use, thereby being favorable for popularization.