The double chain scraper conveyor is a kind of conveying of materials in the form of double chains. It is designed for the situation of large conveying volume. The structure of the buried scraper is simple. It can be arranged in combination, transported in series, can be fed at multiple points, unloaded at multiple points, and the process layout is more flexible. Due to the closed shell, the working conditions can be significantly improved when conveying materials and environmental pollution can be prevented.