The disclosed circuit switch includes following parts: current source in use for providing current for the circuit switch; being in use for controlling on/off of current, a pair of complementation switch is composed of a N type (or P type) metallic oxide semiconductor field effect tube (MOSEFT), and a P type (or N type) MOSEFT; being in use for converting current to voltage, and filtering signal, the transresistance amplifier is composed of a first capacitance, a resistance, and a operational amplifier; being in use for filtering out signal overshooting inducted by control signal, the lowpass filter is composed of a second capacitance and P type MOSEFT. Comparing with traditional circuit switch, the disclosed circuit switch can restrains signal overshoot more effectively. Features are: added capacitance does not require high linearity and is realizable by MOSEFT. Under deep submicro technique, MOSEFT can realize larger capacitance with smaller hardware cost.