The mold industry is the fastest growing industry in today's era. It not only takes the place of manual labor, but also makes some precision products more standard. At first, the development of the groove cover die was derived from the rapid development of the highway and railway construction industry in China. In order to prevent the vehicles from falling into the sides of the ditch, the groove cover mould was invented. With the rapid development of rural urbanization and the rapid development of urban roads, the role of trench cover mold has also been applied to various roads from the previous high speed road. The urban roads not only prevent people from falling into their daily trips, but also prevent the falling of rubbish, thus causing the waterlogging in the urban areas due to the blockage of the side trench.