The invention relates to a contact assembly tensile test tool and a rod end joint thereof. The rod end joint of the contact assembly tensile test tool comprises a rod end joint support which vertically extends. A rod end test machine connection structure which is connected with a test machine is arranged on one end of the rod end joint support. Contact rod connection parts which are placed on two axial sides of the hole of a contact rod in use are arranged on the other end of the rod end joint support. Each contact rod connection part is provided with a support hole which is corresponding to the hole of the contact rod. The invention provides the rod end joint which connects the contact rod and the tensile test machine and a contact assembly tensile test tool which uses the rod end joint.