The invention relates to an all-plastic construction wall for urban municipal engineering road, groove construction and pipeline project such as coal, water, electricity, heat, communication and so on, comprising wall body, substructure and window. Said substructure is hollow cavity. Water inlet is set at the upper of substructure and water outlet is set at the lower of substructure. Bolt and bolt hole are set at two sides of said wall body respectively. Vertical reinforced ribs are set between said substructure and window and transverse reinforced ribs are set on said substructure. Beneficial effects of the invention are that 1) the figuration is beautiful and canonical, it is coincidence with the demand of the whole circumstance in big city, it is easy to clean; 2) working condition of construction is improved and working efficiency is improved; 3) the usage ratio is high and it is applied in the protection of urban municipal facility and building construction; 4) it is provided with high intensity, good tenacity, strong rigidity, heat resistance, cold resistance, acid resistance, alkali resistance, shock resistance and so on; 5) it is the product with energy saving and environmental protection.