Abstract: In order to investigate the practical use for evaluating the liquefaction potential of sand with static cone pe'netration, tests were performed at more than one hundred locations of various seismic intensities in Tangshan district. The test results were analysed by statistical method of discrimination founction.In which the effects of the depth of groundwater level, the depth of sand layer, the thickness of cohesive overlaid soil, the epicentral distance and the penetration resistance had been taken into consideration. A simple method was thus given for evaluating the liquefaction potential of sand by static cone penetration tests.The validity of this method has been further confirmed by the test results of Haicheng earthquake area.