Our special wireless microphone system has these characteristics as the following for many reasons, such as low frequency trading wireless microphone system are easy to be interfered, especially because many machine, carton, vcd, and ld. Eradicate out many harmonic to solve this problem we design this kind professional wireless microphone we adopt a series of measures to improve its functions advance frequency, using multilevel high frequency and mid frequency narrow band filter, multiple noise detect and control we also design its special function to avoid interference from outside.