The invention discloses an aluminum alloy drill rod pipe body and joint connecting structure. The aluminum alloy drill rod pipe body and joint connecting structure comprises a first joint and a second joint located at the aluminum alloy pipe body ends, the first joint comprises an external thread section, an external conical surface section and a first sealing head face arranged in sequence from the outside to inside, and the taper of the external conical surface section is smaller than that of the external thread section; the barrel-shaped second joint comprises an internal conical surface section matched with the external conical surface section, an internal thread section matched with the external thread section, a second sealing head face, an elevator shoulder surface, and a concave arc-shaped transition section between the inner conical surface section and the internal thread section. When the first joint is connected with the second joint, the internal conical surface section generates plastic expansion and deformation, and the concave arc-shaped transition section extends and deforms to compensate the plastic deformation of the inner conical surface section. By means of the aluminum alloy drill rod pipe body and joint connecting structure, the aluminum alloy drill rod pipe body and joint can be assembled under a normal temperature; the aluminum alloy drill rod pipe body and joint connecting structure increases the shackle torque, has dual seal and realizes the expectant sealing performance and connecting intensity between the pipe body and joint.