Through the recycled concrete with a certain dosage of waste rubber particles, the research content of rubber particles on its tensile and flexural strength. Research has found that when the dosage of rubber particles in recycled concrete was 3%, the tensile and flexural strength of concrete have a definite range of growth, growth of 2.58% and 1.54% respectively, the reasons for this situation is due to the rubber particles has good tensile properties and ductility, can play the role of connecting the aggregate in mixed into concrete, so it can increase the tensile and flexural properties of concrete, so the recycled concrete of rubber particles in this experiment the best dosage is 3%.