The present invention relates to a plastic plate clip, comprising a bottom plate (1), a hook (2) and a torsional spring (3). The hook comprises rotating shafts (21) provided on two sides of the front end, connecting portions (22) provided on two sides of the middle part, and a fixed portion (23) provided at the rear end, the two ends of each of the connecting portions being connected to an end of the respective rotating shaft and one end of the fixed portion, respectively. The bottom plate is a plastic plate, and the front end of the plastic plate arches upward to form an arc-shaped groove (11) into which the other end of the rotating shaft is inserted. The torsional spring is sleeved onto the rotating shaft, and one end of the torsional spring is riveted to the rotating shaft while the other end thereof detachably presses against the bottom plate. The hook is hinged to the bottom plate through the rotating shaft. During assembly of the plastic plate clip, the spring is pressed into the arc-shaped groove to automatically implement pre-tightening of the spring, thereby facilitating the assembly and disassembly, and saving the cost.