The utility model relates to a manual scale distance marking device for a thin-gauge steel plate tensile sample, and belongs to the technical field of metallurgical inspection and detection equipment.The marking device comprises a base (1), a working face (2), a fixing device, a scale distance plate (9) and a marking pen (13), the working face (2) is arranged on the base (1), and the fixing device and a positioning device are arranged on the two sides of the working face (2) respectively. The manual tensile testing machine has the advantages of being simple in operation, convenient to assemble and disassemble, small, exquisite, flexible, suitable for various gauge length specifications, high in accuracy, capable of avoiding influence on breakage and the like, operation errors of manual scratching can be made up, the effect of the full-automatic tensile testing machine is achieved, and the manual tensile testing machine is suitable for being installed, popularized and used.