Electrical stimulation protection device

The invention discloses a electrical stimulation protection device. When a current flowing through a load exceeds a certain current value and a time value, power supply is cut off, a state is locked and output of denervated electrical stimulation is stopped. The device comprises: a low voltage power supply circuit providing a stable working voltage, a high voltage side current detection amplifier, a comparator, a counter, wherein the high voltage side current detection amplifier is used to accurately collect the current flowed through the load, convert the current into a voltage signal and then output the signal; the comparator is used to compare the load current detected by the high voltage side current detection amplifier with a set reference current and the output of the comparator can make the counter perform counting or resetting; the counter is used to count the output signal of an oscillator. When counting state duration exceeds a set value, a counting value of the counter can be overflowed. After that