Bearing grinding device convenient to clamp

The utility model discloses a bearing grinding device convenient to clamp, which comprises a working table, an upper grinding plate and a first air cylinder driving the upper grinding plate to move up and down, a clamping unit is arranged on the working table, the clamping unit and the upper grinding plate can move relatively, the clamping unit comprises a first moving block and two second moving blocks, and the first moving block and the second moving block are arranged on the working table. The side faces, close to each other, of the two second moving blocks are in a symmetrical inclined state, the two second moving blocks are connected to the workbench in a left-right sliding mode, a spring is arranged between each second moving block and the workbench, the two second moving blocks are close to each other under the action of the springs, and a second air cylinder driving the first moving block to move front and back is fixedly arranged on the workbench. A notch is formed in the side face, close to the two