The utility model relates to a control system applied to a variable frequency drive type scraper conveyor, in particular to a scraper conveyor control system for performing variable frequency control through a position signal of a coal mining machine and a real-time coal transportation volume signal of the scraper conveyor. The control system acquires a running frequency signal of an explosion protection frequency converter by computing with a designed programmed algorithm according to signals provided by weighing sensors, a recognition sensor and a lower computer signal acquisition controller, and a controller of the explosion protection frequency converter controls running of an explosion protection motor according to the signals. The problem that the variable frequency drive type scraper conveyor cannot be adjusted in transport capacity in real time according to load characteristics is solved, the scraper conveyor is allowed to be adjusted in transport capacity according to comprehensive running conditions of working faces, and the variable frequency drive type scraper conveyor is enabled to form a closed-loop variable-frequency speed regulating running system. Automation level of the fully mechanized coal face can be heightened, and electric energy consumed for mining can be saved.