Abstract: Transmitted in-seam wave exploration technique is the first choice for underground coal mine prospecting. It has the advantage of long detection range and high accuracy. But in the past, the heavy equipment impeded its wide application. We have designed and manufactured a wireless remote seismograph for coal mines, which has the advantage of being free of cable and geophone line to communicate with the main unit. The seismograph has passed EX and MA explosion-proof certification, with operation ability of 240 channels, was used in 9 in-seam wave exploration projects. The excellent performance of the seismograph has been verified, achieving good geology results.