The invention discloses a martensite stainless steel smelting process which is characterized in that the process adopts non-VOD (vacuum oxygen decarbufization) smelting, secondary reduction processes of unstable oxides in and after the VOD or AOD (argon oxygen decarburization) process are reduced, and the oxidation products are removed through continuous slagging, so that the steel ladle is positioned in a high-temperature state for a long time, and erosion loss of the steel ladle is accelerated; the contents of C and P in final components are reduced; the martensite stainless steel comprises the following raw material components in percentage by weight: 0.09-0.12 percent of C, 8-9.5 percent of Cr, 0.85-1.05 percent of Mo, 0.030-0.060 percent of N, less than or equal to 0.02 percent of P and the balance of Fe; and the smelting process comprises the following steps of: A, performing EAF (electric arch furnace) crude refining; B, performing LF (ladle furnace) refining, C, performing VD refining, D, adding chromium nitride and E, discharging to obtain the martensite stainless steel product. According to the process, the smelting time is shortened, the contents of C and P are guaranteed, and the re-oxidation of Cr and carbon is avoided.