Triaxial consolidated drained shear tests were carried out to study the influence of particle strength on the strength and deformation characteristics of the coarse grained soil by preparing cement spherical particles with different strengths and artificial coarse grained soil with a certain grade. The test results show that the particle strength has an obvious influence on the strength and deformation characteristics of the coarse grained soil. The increase of the particle strength causes the increase of the shear strength and the decrease of the volume deformation. Under low confining pressures, the coarse grained soil with high particle strength shows strain softening, while the coarse grained soil with low particle strength shows strain har-dening, and the volume deformation for all the coarse grained soil is dilatation. Under high confining pressures, the coarse grained soil with various particle strengths shows strain har-dening and the volumetric deformation shows shear shrinkage. The relationship between the linear strength index c, φ and Duncan E-B model parameter K,K_b and the particle strength of the simulated material can be expressed by a straight line, while the relationship between the nonlinear index φ₀,φ and the particle strength can be expressed by a quadratic curve approximately. The peak friction angle φ_f also has a linear relationship with the particle strength of the simulated material. When the particle strength increases by 1 MPa, the peak friction angle φ_f increases by 0.066 5°.