The invention discloses a safety pre-warning system of mining equipment, and is mainly characterized by comprising a power supply and distribution detection device, a motor state detection device, a distributed fiber temperature measuring device, a fiber grating temperature measuring device and a safety pre-warning platform, wherein the safety pre-warning platform comprises an industrial computer, a temperature measuring system software, a GSM (Global System for Mobile Communication) and an alarm device, the power supply and distribution detection device comprises a main switch board room measuring circuit, a power utilization device front measuring circuit and a power supply loop measuring circuit, the motor state measuring device comprises a power line, the distributed fiber temperature measuring device comprises a detection fiber and a fiber temperature measuring host, and the fiber grating temperature measuring device comprises a fiber grating sensor and a fiber grating temperature measuring host. According to the invention, by utilizing passive, electromagnetic interference resistant, electrically insulated and corrosion-resistant fiber grating technology and distributed fiber technology, a power carrier technology without laying an additional signal line is unnecessary, the system is safe and reliable, and provides guarantee for effective operation of the mining equipment.