The invention discloses a charge pump circuit which comprises an input high swing amplitude cascode current mirror, an output high swing amplitude cascode current mirror and a suppression charge shared circuit, wherein, a pull-up and a pull-down circuits are formed by a pull-up output cascode current mirror and a pull-down output cascode current mirror in the output high swing amplitude cascode current mirror as well as the suppression charge shared circuit, a pull-up switch pipe and a pull-down switch pipe. The cascode current mirror structure is adopted by output, so that the resistance of the output current mirror is increased, the influence of the change of the output voltage on the electric current is reduced, and the noise of a switching tube is avoided affecting the output voltage. Meanwhile, the sharing effect and the coupling effect of the charge can be inhibited.