The invention discloses a temperature raising method for low-molten iron consumption converter steelmaking. According to the temperature raising method, coke and/or silicon carbide is used for supplementing heat of a molten pool; the coke is added through calculation according to the temperature raising efficiency of 6.2-6.5 DEG C/kg for each ton of steel, and the using amount of the coke is smaller than or equal to 1000kg/furnace; the silicon carbide is added through calculation according to the temperature raising efficiency of 8.6-9.1 DEG C/kg for each ton of the steel, and the using amountof the silicon carbide is smaller than or equal to 500kg/furnace; when Si in molten iron is smaller than or equal to 0.4wt%, the silicon carbide is preferably used; when Si in the molten iron is greater than or equal to 0.65wt%, the coke is preferably used; when Si in the molten iron is greater than 0.4wt% and smaller than 0.65wt%, the coke and the silicon carbide are cooperatively used for raising the temperature. By the temperature raising method, the heat balance of a converter can be effectively guaranteed, and the problems of low converter temperature, long smelting cycle and high consumption of raw and auxiliary materials and the like are solved, so that the scrap ratio of the converter is significantly increased, recycling and cyclic utilization of scrap steel are promoted, and carbon emission is effectively reduced. Compared with the conventional converter smelting, the temperature raising method has the advantages as follows: the yield of molten steel can be increased by 15%or more than 15%; the molten iron consumption is obviously reduced to 800kg/t; the steel cost in converter steelmaking is reduced by 6yuan/t; the cleanliness of the molten steel meets a normal production requirement.