The invention discloses a stress corrosion test machine. The machine comprises a machine frame (G), a hoisting seat (A), a hoisting frame (B), a hanger frame combination (C), a power device (D), an immersion pool (E) and a drainage adding component (F), wherein the hoisting seat is in slide connection with the hoisting frame; the power device drives the hoisting frame to move up and down relative to the hoisting seat; a cam guide groove (5a) which extends up and down is also formed in the hoisting seat, and one section of the cam guide groove is a curved groove (5b); the hanger frame combination is in a framework structure, and the top of the hanger frame combination is hinged with the bottom of the hoisting frame together through a hinge shaft (9) which extends forwards and backwards; a cam shaft is arranged on the side, close to the hoisting seat, of the hanger frame combination, and the cam shaft is matched with the guide groove to extend into the guide groove. The hanger frame combination can swing in a hoisting process, so that a test solution on a test specimen can be dried in a spin-dry manner, the dry time by airing is shortened, and the test efficiency is improved.