Marrow collecting filter

The utility model discloses a bone marrow collecting filter, a main body of which is a hollow tube, the both ends of the hollow tube are provided with a filter inlet and an outlet, three layers of filter meshes with the different diameters of the mesh holes are arranged in the hollow tube, and the diameters of the mesh holes of the three layers of filter meshes are decreased sequentially from left to right. The structure can complete the filtration of the collected bone marrow in the closed filter at one time and the efficiency is high, so the utility model can avoid the defect of easy pollution of the open operation of the traditional filtration methods, has convenient operation and saves the materials at the same time.