The invention belongs to the technical field of polyurethane foaming plastic processing, and particularly relates to a raw material preparing and mixing machine for a processing technology of polyurethane foaming plastic. The raw material preparing and mixing machine for the processing technology of the polyurethane foaming plastic achieves the technical purposes of being uniform and thorough in stirring and mixing and high in stirring and mixing efficiency. In order to achieve the technical purposes, the raw material preparing and mixing machine for the processing technology of the polyurethane foaming plastic comprises a bottom plate, a first support rod, a collection box, a right frame, a left frame, a top plate, an installation plate, a cylinder body, a piston, a first push rod, a first spring, a pressing plate, a flexible pipe and the like. The left end of the top of the bottom plate is welded with the left frame, and a fixed plate is connected with the upper portion on the right side of the left frame through bolts. According to the machine, an electric reel is controlled to rotate clockwise or anticlockwise, a rack is pulled by a guy wire, the rack is matched with a gear, and mixing blades are driven to rotate clockwise or anticlockwise.