Abstract: The special structure of longitudinal sensor array in magnetic leakage detecting equipment leads to the inevitable disturbance between flaw signals and the low performance of equipment. Considering the characteristic of array in detecting signals, the array signal process method based on the independent component analysis(ICA) was used to separate the non-disturbance source signals. Simulation experiment was carried out, and the result showed that this method could reduce the disturbance between flaw signals and met the detected equipment requirements. Thus the fixed point algorithm for ICA has large potential in flaw signals process.