Plastic lock catch device and file pocket thereof

The utility model discloses a plastic lock catch device and a file pocket thereof. The plastic lock catch device comprises a plastic handheld plate, a penetrating and connecting piece and at least one plastic elastic inverted buckle hook, the plastic handheld plate, the penetrating piece and the plastic elastic reverse buckling hook are integrally formed; the middle of the top of the plastic handheld plate extends upwards to form a penetrating-connecting piece, one side of the tail end of the penetrating-connecting piece bends and extends in the inverted direction to form a plastic elastic inverted buckling hook, and a limiting step is formed between the plastic elastic inverted buckling hook and the top of the corresponding side of the plastic handheld plate. The product is simple in structure and low in production cost; the plastic elastic back-off hook is small, but the finger of a person is large, so that the plastic elastic back-off hook is not easy to be compressed, retreat and disengage; in the process