The plastic blind ditch is composed of plastic core wrapped with filter cloth. The plastic core is made of thermoplastic synthetic resin as the main raw material, and after modification, in the hot melt state, the fine plastic wire is extruded through the nozzle, and then the extruded plastic wire is fused on the joint through the molding device to form a three-dimensional three-dimensional network structure. The plastic core has many structural forms such as rectangle, hollow matrix, circular hollow circle and so on. The material overcomes the shortcomings of the traditional blind ditch, has high surface opening rate, good water collection, large voidage, good drainage, strong pressure resistance, good pressure resistance, good flexibility, suitable for soil deformation, good durability, light weight, convenient construction, labor intensity of workers greatly reduced, high construction efficiency, so it is widely welcomed by the engineering bureau, and has been widely used.