Automatic testing device for variable pitch system

The utility model discloses an automatic testing device for a variable pitch system, which comprises a PLC (Programmable Logic Controller) connected and communicated with each driver of the variable pitch system, relays are respectively arranged among each driver, a motor corresponding to the driver, a back-up power supply and a limit switch, and relays are also arranged among the variable pitch system, a power grid power supply and a fan EFC (Electric Fuel Cell) safety chain. The relays are controlled by a PLC to be switched on and off. According to the testing device disclosed by the utility model, automatic testing is carried out by utilizing the PLC when a variable pitch system leaves a factory, the PLC issues a variable pitch control instruction through communication, the relay is controlled through the IO module to carry out function and fault simulation testing, and variable pitch data is monitored in real time in the testing process and whether the variable pitch data meet requirements or not is judge