Scraper conveyor has experienced three stages in the development of coal mining production and construction process. In the course of the 1930s-1940s scraper conveyor is removable, but can only linear laid within a work surface, manual dis-assembly, handling, assembly are needed along with the working surface. Scraper chain is a plate type and single, such as V type, SGD-11 type, SGD-20 type and other small power, light-weight scraper conveyor. The second stage is the early 40s, German - made a curved scraper conveyor, coal mining is being mechanized with the implementation of coal mining machine, metal holder, shift without dis-assembly, coal transportation quantity also increased, the model of SGW-44 type scraper conveyor is the representative products at this stage. The hydraulic support was introduced in the 60s, scraper conveyor came into the third stage in order to adapt to the needs of the development of fully mechanized mining, high power bending heavy scraper conveyor was developed, such as SGD-630/75 type, SGD-630/180.

With the continuous increase of working face production capacity, the main development trend of the scraper conveyor is :
1.Large transportation quantity. Overseas advanced coal mining countries are now using scraper conveyor with transportation capacity up to 1500t (80s) 3500t (90 s) per hours.
2.Long transportation distance. In order to reduce the loss of coal block, length of scraper conveyor working face will be increased, and has reached more than 335 meters.
3.Large power. The power has been developed to the single speed motor up to 525kW, double speed motor 500/250kW.
4.Long service life. Applications of YAOYU chromium carbide overlay plate prolongs the service life of the scraper conveyor, the amount coal mining transportation quantity has more than 6000000 tons.