The invention belongs to the pig iron machining field, and relates to an inspection method of stainless steel, in particular to a simple method for inspecting surface oxidation degree of an annealed stainless steel band. The method is characterized by comprising the following steps: (1) taking out a stainless steel band sample from the outlet of an annealing furnace, and then painting soldering flux on the surface of the sample; (2) melting tin solder, and soaking the sample painted with the soldering flux in step (1) in the molten tin solder; and (3) taking out the sample, inspecting the tin-coating quantity of the sample, and finally judging the surface oxidation degree of the stainless steel according to the tin-coating quantity, wherein, the tin-coating quantity is equal to the tin-coating area of the sample divided by the total tin-melting area of the sample. In the invention, the oxidation degree of the stainless steel band can be obtained by observing the tin-coating quantity of the stainless steel band product to judge the surface oxidation degree of the stainless steel, thus overcoming the defect that the oxidation degree of the stainless steel band can not be rapidly andaccurately judged in the prior art.