AlFeCrCoCu high-entropy alloy particles（HEA_p） reinforced aluminum alloy matrix composites were fabricated by powder metallurgy, and the effects of mass fraction of HEA_p on the microstructure and properties of AlFeCrCoCu/ZL109 composites were investigated. The results indicate that high-entropy alloy particles are evenly distributed in the matrix, and the reinforcement is well combined with the matrix. However, excessive high-entropy alloy content leads to the agglomeration of particles. When the mass fraction of the high-entropy alloy is 15%, the tensile strength of the composites reaches the maximum of 414 MPa, which is 128% higher than that of matrix. When the mass fraction is 20%, the hardness reaches the maximum of 154.8 HV_0.1, which is 179.9% higher than that of matrix with the lowest thermal expansion coefficient. Therefore, the strength and hardness of aluminum alloys can be effectively improved by high-entropy alloy particles, and the composites with the required thermal expansion coefficient can be obtained by adjusting the content of the high-entropy alloy.