A positive-and-negative-voltage charge pump circuit, comprising a clock generation module, a positive-voltage charge pump module, a transient enhancement module, and a negative-voltage charge pump module. The positive-voltage charge pump module generates a positive voltage according to a clock signal output by the clock generation module, and the transient enhancement module is used to sample the positive voltage and a power supply voltage, and convert same into currents for comparison, such that the negative-voltage charge pump module provides a switchable input voltage according to a comparison result. The negative-voltage charge pump module can quickly and reliably establish a negative voltage according to a clock signal output by the clock generation module, thereby improving the speed and efficiency of the negative-voltage charge pump module generating the negative voltage. Further disclosed are an integrated circuit chip, which comprises the positive-and-negative-voltage charge pump circuit, and a communication terminal.