This tensile test machine includes the base, the guard shield, remove the board, loading unit, go up the holder, lower holder and console switch, the guard shield cover is established on the base, and in a guard shield middle part formation cavity space, remove the board setting at guard shield cavity space middle part, and its both sides end respectively with the guard shield of cavity space both sides in the side be connected, it connects below removing the board middle part to go up the holder, down on the base of holder setting under last holder, operation switching system is in base one side top, and be connected with the first electricity of loading, when standard sample test pulling force, the upper end of going up holder centre gripping standard sample, the console switch is opened to the lower extreme of lower holder centre gripping standard sample, and the work of loading unit is carried out the pulling force to the standard sample and is detected. Since its examine the time measuring standard sample set up about being last holder with down between the holder, the standard sample detects under being located loading unit, it is tenesmic to the measuring influence to have overcome standard sample middle part gravity, the convenient operation not only, measurement accuracy moreover.