The utility model discloses one set of instrument that is favorable to drawing rat marrow mesenchymal stem cell, including the fixed clipper blade that is used for fixed rat thighbone or shin bone oneend, be used for cutting the rat thighbone or having an effect of the shin bone other end is cut, fixed clipper blade include first cut, second cut and convex buckle, splint, first cutting cutting being in the same place through pivot intercrossing is articulated with the second, have an effect cut including the third cut, staight scissors and go up the edge of a knife, the edge of a knife down,the third cut with staight scissors being in the same place through pivot intercrossing is articulated, upward the edge of a knife is equipped with edge of a knife cutting edge, the third cut and staight scissors between, third cut being provided with the spring to the rear of cross connection department with staight scissors, the one end of spring is connected and is cut last, other end connection last at the third at staight scissors. The utility model discloses can stabilize shin bone, thighbone, it is hard convenient, make operator labour saving and time saving more, can avoid because improper indiscriminate the flying everywhere that leads to of centre gripping bone is favorable to testing aseptic technique more.