Gas-type tensile testing machine used for rod-shaped metal

The invention discloses a gas-type tensile testing machine used for rod-shaped metal. The tensile testing machine comprises a main control housing; the bottom of the main control housing is provided with a support plate structure; the main control housing and the support plate structure are combined to form an integral structure; the bottom of the support plate structure is fixedly provided with a fixing plate; the internal part of the main control housing is provided with a moving space; a spacing hole structure is arranged on the main control housing on one side of the moving space; a sealing column is arranged on the main control housing on one side of the spacing hole structure; the center of one end surface of the sealing column is provided with a main sealing rubber pad. The gas-type tensile testing machine is taken as a technical measuring equipment of known metal mechanical properties; detection effect is achieved via preset of air pressure; when the air pressure is larger than a preset air pressure,