The mechanical and physical properties of lotus kernel play an important role in deep processing of lotus seeds. This paper established an empirical distribution function of random variables of the shape parameters of lotus kernels. The relationship between the moisture content and the hardness was analysed, and the compression strength of the different surfaces of the same lotus kernels were compared. The results indicate that, with the same moisture content, there is a centralized distribution section for lotus kernel shape. The density of a lotus kernel is higher than that of water. The higher the moisture content, the lower hardness. And the lower moisture content, the higher hardness. Compressed from different directions, the compression strengths of the lotus kernels are different.