Abstract: The present invention discloses a power supply protector for suppressing transient voltage, comprising a timer in a control chip of a control circuit such that when the power supply produces a transient voltage to disconnect a suppressor thereof, the timer will count the time according to a predetermined time, and after the counting is completed, the control circuit will send out a trigger signal to the suppressor, so that the suppressor will be triggered by the trigger signal to resume to the original electrically connected status, and further resume the supply of electric power to the electric equipment, and thus attaining the purpose of automatically restoring the electric power after being disconnected for a certain period of time.