Annular binder clip

The invention discloses an annular binder clip. The annular binder clip comprises a box; a through cavity, symmetrical up and down, is fixedly formed in the box; a rotating rod and a rotation rod arerotationally arranged on the upper and lower end walls of the through cavity in a left-right symmetrical manner; synchronous wheels, an upper wheel and a lower wheel are fixedly arranged on the outersurface of the rotating rod; a power lower wheel is fixedly arranged on the outer surface of the rotation rod; a thread block is provided in a rotary fit connecting mode; a power upper wheel is fixedly arranged on the outer surface of the thread block; the upper wheel is engaged with the power upper wheel; the power lower wheel is engaged with the lower wheel; and the synchronous wheels are in power connection through a belt. The annular binder clip is simple in structure and convenient to use, adopts an automatic mode to realize efficient and automatic opening and closing, improves the file loading and taking efficien