Abstract: Tensile testing of two rock bolts components was experimented in laboratory，which include W-shape steel strip and steel joist，the tensile loading-displacement curve of W steel strip could be divided into four stages：initial loading stage，elastic deformation to yield stage，strengthen after yield stage and broken stage.The deformation and broken characters and bearing capacity of steel strip no only depend on the thickness and width of steel plate，but also related to hole’s shape，sizes and processing technology.The bearing capacity almost the same between circular holes steel strip and non-hole steel strip，but the bearing capacity of long circular holes steel strip decreased obviously than non-hole steel strip.Non-hole steel strip was cracked from fixtures，but steel strip with hole was cracked from the holes position.The tensile loading-displacement curve of steel joist increased slowly and continuously during yield stage and then yield point moved rearward，the bearing capacity of steel joist was mainly depend on mechanics characters and diameter of steel bars，its yield and the maximal loading values all less than two times of the corresponding values of the same diameter round steel，and the yield loading reduction amplitude large than the maximal loading.The elongation ratio all less than the same diameters round steel，its main broken way were double longitudinal steel bars necking，single longitudinal steel bar broken.The problems were analyzed on the basis of the experimental results，and then suggestions were put forward.