The invention relates to a coal mine scraper conveyor sprocket and a manufacturing process, in particular to a coal mine scraper conveyor combined sprocket and a manufacturing process. At present, the sprockets of scraper conveyors used in coal mines all have an overall structure of two or three rows of teeth. It is suitable for mass production, especially in the installation and use, when a certain tooth of the sprocket is broken or worn abnormally, the entire sprocket must be replaced, resulting in another waste of materials. The coal mine combined sprocket of the present invention is composed of a left end cover, a right end cover, a sprocket tooth block, a shaft sleeve, a positioning bolt, and a nut, and each component is consistent with the overall sprocket structure after production and assembly. In the present invention, the integral sprocket is improved into a combined type, and the tooth-shaped block of the sprocket is changed from the original machining to direct forging, which simplifies the process, improves the utilization rate of raw materials and reduces the remanufacturing cost.