The invention discloses a pass box prepared from recycled and modified waste PE plastic woven bags and a preparation method thereof. The pass box is prepared from the following raw materials by weight: crushed waste PE plastic woven bags, HDPE, polybutyl rubber particle, PP-g-MAH, oleamide, glass fiber, fatty acid ester, calcium stearate, active calcium carbonate, glycol, white carbon black, octadecylamine, flexibilizer, silicone powder, dioctyl adipate, polyvinyl alcohol and acetone. According to the invention, the waste HDPE PE plastic woven bags are utilized in the formula, so product cost is greatly reduced; the preparation method is simple, can easily realize industrial production and effectively overcomes the problems of environmental pollution and waste of resources caused by waste and old plastic; the prepared pass box has high notch impact strength, bending strength and hardness; and with the method provided by the invention, the qualified pass box can be effectively prepared, operation process is simple, and large-scale production can be conveniently carried out.