High-performance lithium battery angle grinder

The utility model discloses a high-performance lithium battery angle grinder which comprises an angle grinder main body, the main body comprises a machine body and a grinding disc assembly, the grinding disc assembly comprises a protective cover, the protective cover is arranged on the machine body through a hoop, the hoop comprises a first positioning block and a second positioning block, a through hole is formed in the first positioning block, and a limiting block is arranged on the second positioning block. The moving piece slides in the through hole and the limiting block, a positioning hole is formed in the moving piece, a plug pin is arranged in the limiting block through a first elastic piece, when the moving piece moves towards the limiting block, the plug pin enters the positioning hole, and the hoop is locked in the machine body. Through the moving part, the bolt and the positioning hole, when the positioning hole is matched with the bolt, the hoop is fixed on the machine body and is matched with th