The effects of two different test factors,namely steel fiber volume ratio and strength grade of matrix concrete,on the splitting tensile strength,flexural strength and shear strength of steel fiber concrete were analyzed through laboratory tests,and the bivariate analysis of variance was used for comparison and verification.The results show that the volume percentage of steel fiber and the strength grade of matrix concrete are important factors affecting the mechanical properties of steel fiber reinforced concrete.With the increase of concrete strength grade and steel fiber volume ratio,the splitting tensile strength,shear strength and flexural strength of steel fiber concrete show an increasing trend,but the increase will gradually slow down.The strength grade of matrix concrete has more obvious effect on the splitting tensile strength of concrete,while the volume ratio of steel fiber has more obvious effect on the shear and flexural strength of steel fiber concrete.The results of binary variance analysis are consistent with the impact tests for steel fiber concrete index.The research results can provide reference for optimizing the mix ratio design of steel fiber reinforced concrete in practical engineering.