In order to study the effects of basalt fiber and polyformaldehyde fiber mixing on the mechanical properties of recycled concrete, three levels of basalt fiber length to diameter ratio (A), volume content of polyformaldehyde fiber (B) and recycled aggregate substitution rate (C) were selected as design parameters to carry out orthogonal experimental design, observe the failure forms of specimens and analyze the data results. The results show that POM fiber volume content has the greatest influence on concrete mechanical strength, the increase of regenerated aggregate replacement rate will reduce concrete slump and mechanical strength, and the addition of BF with 80 aspect ratio has the best effect on the improvement of concrete mechanical strength. The optimal combination of compressive strength is A2B1C2; The optimal combination of splitting tensile strength and flexural strength is A2B2C3.