Based on the characteristics of coal slime and its increase of throughput in coal preparation plant, which easily caused overload phenomenon by double-axis screw conveyor, the materials without axle was prone to cause spiral internal friction increases caused by spiral screw rotation from the original cloth circle with the flow, and so on and so forth. According to the above problem, the factory decided to conduct this 4 sets of screw conveyor motor real-time condition and parameters through the intelligent motor protector and anybus gateway module supporting the intelligent motor protector for profibus-dp protocol MODBUS protocol conversion and connection with original Profibus network, at the same time the parameters into the upper machine, in order to realize the working condition of motor in real time to adjust the motor speed and quantificationally, after the completion of the modification of the various parameters upload real-time, it was effective for the whole coal slime drying system, which provided guarantee the normal operation.