Based　on　the　study　of　friction　haulage　system　mechanism　experimentation,　studied　the　policy　of　guarding　against　sliding　and　random　forecast　monitor　of　friction　haulage　system　based　on　wavelet　transform.　The　results　show　that　wavelet　transform　not　only　clean　weed　noise,　but　also　can　effectively　abstract　signal　character.　The　content　of　studying　on　guarding　against　sliding　policy　of　friction　haulage　system　based　on　wavelet　transform　includes:　mechanism　of　guarding　against　sliding,　analysis　of　quadratic　B　spline　wavelet　transform　with　the　friction　haulage　system　squirm　distortion　signal,　and　hardware　project　and　the　software　programme　of　CPLD-DSP　control　system.