The utility model discloses a be applied to weight formula tripper of complicated material, including cavity and impeller, the impeller is organized the transmission through the transmission and is connected, the inside closing plate that is equipped with the arc structure of cavity, the closing plate upper end is connected with the weight through the connecting rod, this weight formula tripper simple structure, material transport are difficult for blockking up, the air leakage is little, and the life cycle is long, can adjust the distance between closing plate and the impeller in a flexible way according to the material of different granules.