Grinding device with clamping mechanism and clamping method thereof

The invention relates to the technical field of grinding devices, in particular to a grinding device with a clamping mechanism and a clamping method thereof. The grinding device comprises a device body, the device body comprises a lathe body, an L-shaped mounting rack, an air cylinder body and a motor body, and a control panel is arranged on the front face of the lathe body. A rotating rod is rotatably mounted at the bottom end of the motor body, and an insertion mounting groove is formed in the bottom end of the rotating rod. A clamping mounting box, a reverse lead screw, a movable sleeve, a clamping mounting plate and an L-shaped clamping plate are arranged, the reverse lead screw is rotated forwards through a handle, so that the L-shaped clamping plate is driven to clamp and fix a workpiece, the problem that most of existing grinding devices for the production of aluminum alloy thermal insulation windows do not have a clamping function, the workpiece needs to be manually held by hands to be ground, the cla