Abstract: In order to solve the speed unmatched problem between the detection and excavation seriously restricted the mine seam gateway driving efficiency in th e present mine seam gateway driving process, a seam gateway pilot detection instrument with the frequency conversion method was developed.The pilot detection instr ument was consisted with a transmission module, receiving module and explanation software.With the powerful simulation modeling capacity of the SIMULINK, the simu lation development, similar experiment, improved design and others of the instrument was firstly developed and then the prototype was manufactured.The cost could be saved and the development period could be reduced.The paper stated the basic principle of the instrument and in detail introduced the the simulation study work of the transmission module, including the function, composition and model of the transmission module.The SIMULINK simulation was completed for the transmission module a nd the designed transmission current waveforms were obtained.