Handheld grinding device convenient to protect

The utility model relates to the technical field of engineering machinery maintenance, in particular to a handheld polishing device convenient to protect, which comprises a polishing mechanism, a protection mechanism is fixedly connected below the polishing mechanism, a handheld mechanism is fixedly connected to one side of the polishing mechanism, and a collecting mechanism is fixedly connected to one side of the polishing mechanism. The grinding mechanism comprises a shell, and a switch is fixedly connected to the top of the shell. According to the improved handheld polishing device, the protective plate and the protective shell are additionally arranged outside the polishing disc to wrap the polishing disc inside for protection, and the potential safety hazard caused by the fact that the polishing disc easily scratches other people when the engineering machinery maintenance tool is not used for a long time is avoided; and meanwhile, the protection plate rotates to the position below the handheld rod in a r