The invention relates to a preparation method for mother liquid of nickel chrome stainless steel. The preparation method comprises the steps that laterite-nickel ore, chromite fine ore, a carbonous reducing agent and an annexing agent are evenly mixed according to the mass ratio of 40%-60% : 20%-40% : 8%-15% : 1%-6%, a mixed material is obtained, wherein the water content of the laterite-nickel ore is 5%-20%; the mixed material is pressed into balls and dried, and pellets are obtained; and the pellets are roasted under a reducing atmosphere at 1250-1400 DEG C, and pre-reduced pellets are obtained; and the pre-reduced pellets are transported to a smelting furnace in a hot transportation mode to be smelted, and then the mother liquid of the nickel chrome stainless steel is obtained after slag-iron separation. According to the preparation method for the mother liquid of the nickel chrome stainless steel, the smelting cycle is shortened, the materials are extensive in source and low in price, and the smelting cost of stainless steel is reduced greatly; and compared with the prior art in which the treatments on ferro-nickel and ferrochrome are two independent technologies correspondingly, the preparation method for the mother liquid of the nickel chrome stainless steel overcomes the defects that existing technologies are complex, the technological process is long, the energy consumption is high, pollution is severe, and the operation cost is high, and the energy consumption of smelting of an electric furnace is effectively reduced.