Abstract: For the Sihe Coal Preparation Plant tailings workshop filter press work completely by the workers manually, now on the filter press to upgrade. Through the master station and the way from the station to achieve automatic filter press production and group control. Between the master station and the slave PLC, between the PLC and the host computer through the Datalin intelligent gateway to achieve the data WiFi transmission, engineers can remotely control the PLC. At the same time through the Android mobile terminal by way of WebService to achieve access to the remote database. The test results show that the filter press can work automatically, and the staff can remotely monitor and control the filter press through the mobile phone client. The system can effectively reduce the labor intensity of the workers and realize the improvement of the tailings workshop.