The utility model discloses a silica powder high-speed mixer. The silica powder high-speed mixer comprises a reaction kettle, wherein the reaction kettle is internally provided with a mixing blade; the inner wall of the reaction kettle is provided with groove lines; The groove lines are a group of line structures vertically arranged; the depth of each groove line is 0.5-2 mm; the outer wall of the reaction kettle is further provided with a resistive heater. The silica powder high-speed mixer is simple in structure, so that silica powder inside the reaction kettle rubs against each other, and the color of the silica powder is prevented from changing due to introduction of impurities. The silica powder high-speed mixer can be widely applied to the field of silica powder mixing.