The scraper conveyor which was pulled by scraper chain and bulk materials handled within the trough was called scraper conveyor. The scraper conveyor whose adjacent middle trough can be bended to a limited degree in the horizontal and vertical plane was called flexible scraper conveyor. Among them, the working face conveyor whose frame presents90°bend arrangement at the intersection of working face and haulage roadway was called roller curve scraper conveyor. Within the current coal cutting working face, scraper conveyor not only conveys coal and materials but also the operation orbit of coal cutter. It thus becomes an indispensable main equipment of the modern coal mining technology.