Relay contact protection circuit

The utility model provides a relay contact protection circuit. The relay contact protection circuit comprises a relay module, an MOS tube module, a relay driving module, an MOS tube driving module and a simulation load module. The whole system is powered by a direct-current power supply, the relay module and the MOS tube module are connected in parallel and are connected in series between a power supply anode and a load, and the load module is connected in series between the relay module and a power supply cathode. According to the utility model, in a time period when a relay contact is closed, a power supply starts to pre-charge the capacitor C1 through the MOS tube and the current-limiting resistor, the charging duration and the charging effect can be adjusted through the current-limiting resistor R5, after the capacitor C1 is charged for a period of time, the closing action of the relay is completed, and the C1 is close to a fully charged state, so that the relay is closed. And the surge current can be eff