The utility model relates to the field of injection molding machines. The raw material hopper comprises a hopper body, wherein the first box body, the inverted pyramid frustum and the second box bodyare sequentially communicated from top to bottom. A top plate is mounted at the top of the first box body; a feeding hole is formed in the top plate; a bottom plate is arranged at the bottom of the second box body; a plurality of pipe connectors are symmetrically arranged on the side wall of the second box body in a penetrating mode, the bottom ends of the pipe connectors are tangent to the upperend face of the bottom plate, at least one of the pipe connectors is detachably connected with the air inlet pipe, at least one of the pipe connectors is detachably connected with the raw material conveying pipe, and the other pipe connectors are detachably connected with the air inlet pipe or the raw material conveying pipe. According to the utility model, raw materials can be extracted in a combined multi-directional manner, the simultaneous extraction of the raw materials by a plurality of injection molding machines can be realized, the supply speed of the raw materials required by the injection molding machines is increased, the raw materials are conveyed to the next process in a closed manner in the whole process, material extraction and dust raising are avoided, and the environment of an injection molding workshop, particularly a dust-free injection molding workshop is improved.