Product introduction of filling machine hopper: A filling machine hopper fixing device, comprising a hopper, a filling machine, a rubber ring, and an inner hexagonal bolt. The bottom of the hopper has a base, and rectangular convex block grooves are uniformly distributed inside the base. Tooth grooves are uniformly distributed inside the base, and stepped holes are provided inside the rectangular convex block grooves. The top of the filling machine has an assembly convex platform, and rectangular convex blocks are uniformly distributed outside the assembly convex platform. Outer teeth are uniformly distributed outside the assembly convex platform, and the rectangular convex block has an internal threaded groove. The assembly convex platform is placed inside the base, the rectangular convex block is placed inside the rectangular convex block groove, and the outer teeth are placed inside the tooth groove. The stepped hole cooperates with the internal threaded groove to form a fixed threaded cavity. The hopper has an internal cavity, and the filling machine has a discharge hole inside. The inner cavity of the hopper is matched with the feeding hole.