A bone powder filling tool includes a handle connectable to a rotary dental instrument, and a bone powder propelling bit located one end of the handle. The bone powder propelling bit has opposing top end portion and bottom end portion, bone powder transferring grooves spirally extending around the periphery thereof from the top end portion to the bottom end portion, and bone powder propelling threads extending around the periphery thereof at different elevations for rapidly and uniformly propelling bone powder into the space between the sinus floor and the cortical bone to increase the thickness of the cortical bone in favor of the process of the subsequent tooth implanting, helping the doctor in charge of the operation save operating time and physical strength.
