Abstract: According to the characteristics of scraper conveyor in coal mining face and the particularity of working environment, a wireless control device of scraper conveyor is designed based on the existing wired control device. The device is divided into wireless handheld terminal and wireless fixed terminal. The wireless communication adopts low-power long-distance RF module based on LoRa technology. The controller adopts STM32 low-power microprocessor. The two terminals control the scraper conveyor by wireless communication. The overall design scheme and the realization of software and hardware are described. The experiment shows that the device has high reliability and sensitivity, which supplements the control mode of scraper conveyor.