The invention discloses a detection method of components of stainless steel waste steel, which pertains to the detection process of the components of the stainless steel waste steel. In the method, the mixing ratio by weight percentage of 30 to 50 percent of stainless steel waste steel, the mixing ratio by weight percentage of 12 to 17 percent of chromium-iron alloy, the mixing ratio by weight percentage of 1 to 3 percent of nickel and the mixing ratio by weight percentage of 37 to 50 percent of dephosphorizing liquid iron are added at the batching stage; the oxygen blowing amount is controlled at 0 to 6m<3>/t at the melting stage, 1.0 to 2.0kg/t of ferrosilicon powder is injected at the reduction stage, 1.5 to 3.0kg/t of ferrosilicon is added, and contents of chromium and nickel in the waste steel are finally calculated by utilizing the contents of the chromium and the nickel in the steel liquid, yields of the chromium and the nickel in an electric furnace and structure of raw materials. The detection method dilutes inclusions of the stainless steel waste steel, thus reducing the impact of the inclusions on forming the steel liquid by melting by the electric furnace, reducing power consumption used in the melting by the electric furnace, shortening the smelting period and further reducing the impact of melting down of the stainless steel waste steel on the normal production when the detection of the components is carried out.