Multifunctional tensile test tool capable of being quickly replaced

A test tool body comprises an upper clamp body and a lower clamp body which are used for being installed on a tensile testing machine and do not need to be detached from the tensile testing machine when a tensile sample is replaced, and the upper clamp body and the lower clamp body are correspondingly provided with an upper chuck and a lower chuck which can be freely taken and placed. The upper chuck and the lower chuck are used for clamping tensile samples together and can be correspondingly replaced according to different types of tensile samples, and the upper chuck and the lower chuck are fixed through opposite tensile forces of the upper clamp body and the lower clamp body. According to the invention, the clamp bodies and the chucks are designed in a separated manner, so that when a tensile test is carried out, the upper clamp body and the lower clamp body do not need to be detached from a tensile testing machine, and different chucks are selected for replacement according to different sample types, so t