Protection system for hydraulic system of heading machine

The utility model relates to a protection system for a hydraulic system of a heading machine. The system comprises an oil temperature and oil level integrated sensor, a controller, a display, a contactor and an oil pump motor; the oil temperature and oil level integrated sensor is connected with the controller; the controller is connected with the display; at the same time the controller is also connected with the contactor; and the contactor is connected with the oil pump motor. The oil temperature and oil level integrated sensor transmits an acquired and converted oil temperature and oil level signal to the controller and the controller converts the signal into oil temperature and oil level values and then transmits the values to the display to display. When the oil temperature is high or the oil level is low, the display gives an alarm; and when the oil temperature is excessively high or the oil level is excessively low, the controller outputs a signal to switch off the contactor and a power supply of the oil pump motor is switched off by the contactor to enable the oil pump motor to stop working, so that the hydraulic system stops operating and the aim of protecting the hydraulic system is fulfilled.