The utility model discloses an automatic telescopic protective cover for an electric appliance cabinet in an intelligent substation. According to the utility model, the rail (4) is arranged at the periphery of the electric appliance cabinet (12); a plurality of groups of U-shaped frameworks are arranged on the rail; waterproof cloth (11) and anti-radiation cloth are arranged outside the U-shaped framework; according to the utility model, the electric appliance cabinet can be protected; rainwater is prevented from entering the electric appliance cabinet to damage electric appliance components in the electric appliance cabinet; meanwhile, the anti-radiation function can be achieved, and the anti-radiation device has the advantages of being simple in structure, convenient to operate and the like, has certain economic benefits, more importantly, can effectively improve the reliability of power supply of a power grid and the like, and is suitable for large-scale application and popularization.