Successful feeding is critical to biomass utilization processes such as pyrolysis. The biomass particles in hopper frequently become bridge or adhere to the wall, and it does not provide the required uniform and continuous flow of the feedstock materials. Therefore, an automatic shake mechanism is devised which is set in the hopper and driven by the rotating of the first screw. The experiments were done using the automatic shake mechanism. The results show that the biomass particles can deliver uniformly by screws without extra power consumption and increased the delivery capacity.