Abstract: In order to explore the anisotropic characteristics of coal under the effect of structural defects and clarify the relationship between various physical and mechanical parameters.In this paper, coal samples are processed in groups according to different bedding angles, and the wave velocity of complete coal samples is tested.The uniaxial test is completed by using MTS815 rock servo rigid test system.The mechanical parameters of coal samples are obtained, and the correlation between physical parameters of coal samples with different bedding angles is analyzed.The results show that the anisotropy of mechanical and acoustic characteristics of coal body is prominent:the strength of coal sample with horizontal bedding is about twice that of the other two groups of coal samples, and the wave velocity decreases with the increase of the angle between bedding and coal sample axis.For coal samples with the same bedding angle, each physical quantity has a good correlation, which indicates that the ultrasonic nondestructive detection technology can be used to invert the internal structure characteristics and mechanical parameters of coal and rock.To a certain extent, it makes up for the defect that it is difficult to obtain mechanical parameters of coal and rock mass by large-scale in-situ loading test, and provides a new idea for production site prediction and early warning of mine disasters.