The invention discloses a bit feed tool and belongs to the field of deepwater well drilling. The bit feed tool comprises a drilling fluid cavity formed in a sleeve and connected with an upper barrel body; the drilling fluid cavity is connected with a piston chamber; the piston chamber is connected with a drive chamber; a drive rod is arranged in the middle of the drive chamber and connected with a rotating part; and the rotating part is connected with a lower connector. The bit feed tool has the characteristics that in the deepwater well drilling process, impact on seabed shale is small, and collapse of the seabed shale is reduced; drilling fluid is cooperatively discharged out in the bit feed process, and generation of gas hydrates is reduced; and the drilling fluid is modified, the performance of the drilling fluid is improved, and generation of the hydrates is suppressed effectively.