Grinding filter for preparing tissue single cell

The grinding filter comprises a grinding pipe and a grinding pestle, one end of the grinding pipe is plugged with a first screen, a second screen is fixed in the grinding pipe, the second screen is parallel to the first screen, a gap is formed between the second screen and the first screen, and the mesh number of the first screen is smaller than that of the second screen; the grinding pestle comprises a connecting column, a handle and a grinding head, the handle is fixed to one end of the connecting column, the grinding head is fixed to the other end of the connecting column, and the end, away from the handle, of the grinding head can abut against the side face, away from the first screen, of the second screen. The first screen and the second screen are arranged in the grinding pipe, the grinding pestle comprises the handle, the connecting column and the grinding head which are sequentially fixed, the grinding head can abut against the second screen, and high-quality single cells can be efficiently and rapidl