The invention relates to an optical fiber connecting device, in particular to an LC-type short-tail heat-shrink-tube-free optical fiber moving connector which comprises an inserting core, a connecting member, a spring, a tail sleeve, a shell, an optical cable bare fiber and a pressing-connecting ring. The head end of the connecting member is connected with the shell, the tail end of the connecting member is connected with the tail sleeve, the shell and the connecting member form a cavity, the spring and the inserting core are disposed in the cavity, one end of the optical cable bare fiber is fixed to the inserting core while the other end of the same penetrates the cavity, a riveting-pressing member is arranged at the tail end of the connecting member, the pressing-connecting ring is arranged on the riveting-pressing member at the tail end of the connecting member, the tail sleeve is sleeved outside the pressing-connecting ring, the tail sleeve is in the shape of a hollow cylinder, and the outer surface of one end of the tail sleeve shrinks inwards. The LC-type short-tail heat-shrink-tube-free optical fiber moving connector is simple in structure, small in occupied space and convenient to mount and use, and shedding can be effectively prevented.