The invention relates to a cookware corrosion-resistant tester for stainless steel tableware, which comprises a machine body, an upright post, a cantilever, a reciprocating mechanism and a constant temperature working chamber. The upright post is fixedly connected with the machine body, and the cantilever is fixedly connected with the upright post. A protective barrel of the constant temperature working chamber is erected on the machine body, a constant temperature groove is formed in the protective barrel, a brine tank is arranged in the constant temperature groove, and an electric heating pipe is arranged in a space between the brine tank and the constant temperature groove. The upper ends of the brine tank, the constant temperature groove and the protective barrel are connected with a cover plate respectively, an opening and closing cover is covered on the cover plates to enclose a closed space, a motor of the reciprocating mechanism is arranged on a motor base, a gear and a rope pulley are arranged at two ends of a driving shaft respectively, an output shaft of the motor is connected with a crank connecting rod which is connected with a rack, two ends of the rack are arranged on a rack bearing block respectively, the rack is meshed with the gear, and one end of a rope is fixed with the rope pulley while the other end rounds a fixed pulley in the upright post and a fixed pulley arranged in the cantilever and is connected with a hanging tool. The cookware corrosion-resistant tester has the advantages of low energy consumption, less chemical substance consumption, less harmful substance emission, improvement on the testing environment, advantageous environmental protection, high test accuracy and quickness.