Abstract: At present, the equipment monitoring system of filling working face mainly adopts traditional monitoring method based on two-dimensional monitoring, with underground application of filling hydraulic support increases gradually, the accuracy of movement of the parts of filling hydraulic support and group support cooperative movement has a great influence on underground filling mining efficiency. However, the two-dimensional planar motion is unable to describe complexity of the filling hydraulic support action, and needs to upgrade monitor interface to three-dimensional space, and monitor working condition of filling hydraulic support from the perspective of different locations and different angles, so as to improve mine safety coefficient. For the above problems, a three-dimensional scene monitoring system for filling hydraulic support was designed by using three-dimensional engine technology. The system is mainly composed of three-dimensional virtual simulation software, data acquisition module and data communication module. Based on Unity3d, the three-dimensional virtual simulation software is used to establish the system monitoring interface. The computer displays the dynamic changes of monitoring data such as roof pressure values of the filling hydraulic support, the angle offset between each pin shaft and the displacement of the hydraulic cylinder, so as to realize the three-dimensional real-time monitoring of the filling hydraulic support. System monitoring interface can be divided into two parts of entity scene monitoring interface and data monitoring interface:entity scene monitoring interface uses 3ds Max modeling software to establish three-dimensional entity model and three-dimensional scene model of filling mining equipment, and to optimize processing and rendering of the three-dimensional model, so as to achieve scene-driven consistent with the actual working space on filling working face; the data monitoring interface collects, analyzes and processes the working state information of the filling working face through the data acquisition module, and transmits the information to the three-dimensional virtual simulation software through the data communication module to realize the matching between the monitoring data and the software. The effectiveness of the system is verified by practical application.