Abstract: The effect of normalizing temperature on the microstructure and mechanical properties of refractory steel is studied.The results show that when the normalizing temperature are 700℃ and 750℃, the microstructure consists of needle-like or striped ferrites and a small number of martensites; when the normalizing temperature increases to 800℃, the content of striped ferrite in the matrix microstructure of refractory steel decreases, but the content of bulk ferrite increases; when the normalizing temperature continues to increase to 850℃, the matrix micro structure consists of mainly ferrite; when the normalizing temperature are 700℃ and 750℃, although the strength of the refractory steel is high, the plasticity is poor, and the yield ratio is higher than 0.8, which can't meet the requirements for the use of refractory steel (< 0.8). The tensile strength, yield strength and elongation at break are 595 MPa, 465 MPa and 22% when the normalizing temperature is 800℃.