A positive and negative voltage driving circuit of an active stylus, comprising: a positive and negative voltage generating module comprising a switch module; and a control module being configured to control a turn-off state and a turn-on state of the switch module, to enable the positive and negative voltage generating module to alternately output a positive voltage and a negative voltage to a stylus tip of the active stylus; wherein: the positive and negative voltage generating module further comprises a first positive voltage generating module and a first negative voltage (-U) generating module; the first positive voltage generating module is configured to generate the positive voltage, one end of the first positive voltage generating module is connected to a ground, and the other end of the first positive voltage generating module is connected to the stylus tip; the first negative voltage generating module is configured to generate the negative voltage, one end of the first negative voltage generating module is connected to the ground, and the other end of the first negative voltage generating module is connected to the stylus tip; the first positive voltage generating module further comprises a first boosting unit, the first boosting unit comprises a first inductor and a first diode, and the first boosting unit is configured to receive a power supply unit to charge the first inductor and output energy to the stylus tip; the first negative voltage generating circuit comprises a second boosting unit, the second boosting unit comprises a second inductor and a second diode, and the second boosting unit is configured to receive the power supply unit to charge the second inductor and output energy to the stylus tip, wherein an anode of the first diode is connected to the first inductor, a cathode of the first diode is connected to the stylus tip through one switch, a cathode of the second diode is connected to the second inductor and an anode of the second diode is connected to the stylus tip through another switch. a positive and negative voltage generating module comprising a switch module; and a control module being configured to control a turn-off state and a turn-on state of the switch module, to enable the positive and negative voltage generating module to alternately output a positive voltage and a negative voltage to a stylus tip of the active stylus; wherein: the positive and negative voltage generating module further comprises a first positive voltage generating module and a first negative voltage (-U) generating module; the first positive voltage generating module is configured to generate the positive voltage, one end of the first positive voltage generating module is connected to a ground, and the other end of the first positive voltage generating module is connected to the stylus tip; the first negative voltage generating module is configured to generate the negative voltage, one end of the first negative voltage generating module is connected to the ground, and the other end of the first negative voltage generating module is connected to the stylus tip; the first positive voltage generating module further comprises a first boosting unit, the first boosting unit comprises a first inductor and a first diode, and the first boosting unit is configured to receive a power supply unit to charge the first inductor and output energy to the stylus tip; the first negative voltage generating circuit comprises a second boosting unit, the second boosting unit comprises a second inductor and a second diode, and the second boosting unit is configured to receive the power supply unit to charge the second inductor and output energy to the stylus tip, wherein an anode of the first diode is connected to the first inductor, a cathode of the first diode is connected to the stylus tip through one switch, a cathode of the second diode is connected to the second inductor and an anode of the second diode is connected to the stylus tip through another switch. the positive and negative voltage generating module further comprises a first positive voltage generating module and a first negative voltage (-U) generating module; the first positive voltage generating module is configured to generate the positive voltage, one end of the first positive voltage generating module is connected to a ground, and the other end of the first positive voltage generating module is connected to the stylus tip; the first negative voltage generating module is configured to generate the negative voltage, one end of the first negative voltage generating module is connected to the ground, and the other end of the first negative voltage generating module is connected to the stylus tip; the first positive voltage generating module further comprises a first boosting unit, the first boosting unit comprises a first inductor and a first diode, and the first boosting unit is configured to receive a power supply unit to charge the first inductor and output energy to the stylus tip; the first negative voltage generating circuit comprises a second boosting unit, the second boosting unit comprises a second inductor and a second diode, and the second boosting unit is configured to receive the power supply unit to charge the second inductor and output energy to the stylus tip, wherein an anode of the first diode is connected to the first inductor, a cathode of the first diode is connected to the stylus tip through one switch, a cathode of the second diode is connected to the second inductor and an anode of the second diode is connected to the stylus tip through another switch.