A fluorspar powder?feeding weightlessness?balance comprises a discharging corkscrew spin, a compensator, a manual gate valve, a power bin, a reduction gear, an electronic scale and a support, and is characterized in that: a cone with a conic node facing upwards is arranged in the power bin; a cindervalve is installed between the compensator and a discharging corkscrew spin feed inlet; and a rotational signal of the cindervalve is connected with the electronic scale through a wire. According to the fluorspar powder?feeding weightlessness?balance provided by the utility model, with the cone installed in the power bin, the bridging phenomenon caused by three extrusion forces formed by materials from two sides and the center during the discharging process in the power bin is eliminated by the cone; due to the design of the cindervalve, the compensator will not generate large pressure during the feeding process so as to avoid the material-scouring phenomenon; and feeding stability and weighing precision are increased.