Fastener assembling tool convenient to adjust

The utility model relates to a fastener assembling tool convenient to adjust. The fastener assembling tool comprises a handle, one end of the handle is a U-shaped rotation groove, a rotation shell is rotatably installed in the rotation groove, a sealing cover is detachably arranged at an end opening of the rotation shell, and the sealing cover is rotatably connected with a first half shaft stretching into an inner cavity of the rotation shell. A second half shaft which is detachable with the first half shaft is installed in an inner cavity of the rotary shell in a rotating mode, a ratchet wheel is arranged at the end, stretching into the inner cavity of the rotary shell, of the first half shaft, a guide groove is formed in one side of the inner cavity of the rotary shell, and a positioning block is installed in the guide groove in a sliding mode. The first half shaft and the second half shaft are subjected to rotary packaging, the ratchet wheel is subjected to one-way locking through the positioning block und