Abstract: Spread spectrum communication is the most efficient mode in the strong noise environment such as the coal mine. This article introduces the the principle of the DS communication technic.It indicates that the DS communication anti-jamming technic is especially applicable to the strong noise environment.The spread spectrum communication can reduce high request to the Signal-to-Noise, especially can overcome some defects caused by multiple-path effect and noise, including feeble anti-interference ability and poor speech quality.At last the article introduces the generator and pertinency of the m-sequences ,and uses the MAX+PLUS II of the ALTERA to simulate.