The problems of sidewall belt conveyor, such as bad working environment and waste of materials, are caused by running vibration, deviation and sidewall belt conveyor. The conventional treatment methods are as follows: Manual cleaning, flat belt covering on the guard belt and scraper recovery. Manual cleaning efficiency is very low and the effect is not good: The flat belt covered on the belt of the guard is in contact with each other, resulting in a more complex overall structure, which is easy to lead to deviation during operation, with increased operation and maintenance costs, and can not recover secondary spattering and other drawbacks: The scraper recycling spattering has the problem of running noise, material accumulation in the turning section can not be recovered, and it is easy to get the chain broken leading to high failure rate. In order to solve the shortcomings of the existing technology, a material recovery system of sidewall belt conveyor with simple and stable structure, large recovery range and high efficiency, no dead angle in recovery cycle, and less pollution and waste is provided. The recycling material system comprises the fixed installation of the equipment and the pipe chain machine, the equipment is sealed, the sidewall belt conveyor inclined section is provided with a sealed flow guide plate, the pipe chain machine for horizontal pipe chain machine and vertical pipe chain machine, and staggered installation. The lower part of the equipment is provided with an intermediate frame, and the upper part of the wave-shaped retaining conveyor is provided with an inlet guide trough. The horizontal pipe chain machine is located in the lower part of the equipment, the horizontal pipe chain machine and the vertical pipe chain machine are each equipped with an independent drive motor, so that the entire movement system of the pipe chain machine is independent of the sidewall belt conveyor, the structure is simple and stable, does not affect the operation of the wave retaining conveyor, the failure rate is low, and the use and maintenance are easy. The horizontal pipe chain machine is provided with an opening hole, and the horizontal pipe chain machine is provided with a material guide groove, and is connected with the opening hole through a flange, and the structure is firm and simple. The feeding guide groove is connected with the middle frame, the lower part of the horizontal pipe chain machine is provided with a chute, the chute is connected with a vertical pipe chain machine, and the material is scattered through the chute from the horizontal pipe chain machine to the vertical pipe chain machine. An outlet chute is arranged on the vertical pipe chain, and the outlet chute is connected with the inlet material guide chute. The benefit of the technical solution is that: The whole sealing is more environmentally friendly without dust, the sidewall belt conveyor drops the material above the inclined section through the inclined section sealing plate diversion to the horizontal pipe chain machine, the horizontal pipe chain machine is set through the guide chute, to realize the material recovery of the inclined section and the lower section, the recovery range is large: Two staggered pipe chain machines and sidewall belt conveyor form a closed loop to achieve recycling, recycling efficiency is high: