The invention provides a control loop coil fault reducing device and method. The control loop coil fault reducing device comprises a comprehensive protector which comprises a current display panel, a time display panel, a first single-chip microcomputer, a second single-chip microcomputer, a switching power supply, a time output relay and a current output relay. Sampling of current flowing through a control loop coil is performed by the sampling resistor arranged in the comprehensive protector and the numerical values are transmitted to the first single-chip microcomputer. After the numerical values reach the starting value, the current output relay is started, and an output signal is transmitted to the second single-chip microcomputer. The time display panel starts timing. When timing reaches the starting value, the time output relay is started, and the time output relay actuates to disconnect a control power supply air switch so that the fault of the coil can be avoided. According to the device and the method, the number of times of failure of separating and closing coils can be effectively reduced, the steps are simple, operation is convenient and practicality is high, and thus the device and the method are safe and reliable.