Abstract: Grain size of 75 sandy sediment samples from the Liaoning coast was measured using the laser particle size and shape analyzer and pipette-sieve method in this paper. Correlation analysis and regression equations of each definite size content and grain size parameters were analyzed for studying the law between the two analyzing methods. The results show that the content of coarse sand and gravel is higher if the laser particle size and shape analyzer is used comparing to figures measured by the pipette-sieve method. However, the pattern of median grain size and average grain size remains the same as the coarse sand, and the pattern of middle sand and fine sand content is opposite. The correlation analysis reveals that the grain sizes measured by the laser particle size and shape analyzer are coarser, but the correlation between grain content and grain size parameters of two test methods are all good, and the correlation coefficients between the median grain size and average grain size are both greater than 0.9.