Ancient people used coarse cloth and hemp as raw materials to make fish nets by binding them in coils. Although this kind of fishing net is perishable and has poor tenacity, its fishing efficiency has been greatly improved. With the development of fishery, the objects of fishing and hunting are not only fish, but also fishing tools. Modern fishing nets are mainly processed with polyethylene, nylon and other raw materials. It has a longer service life and higher fishing efficiency, and can be classified by different ways of use. For example, traditional fishing nets (hand net, hand cast net), trawls powered by boats, and gill nets (triple net, purse seine) with different mesh for trapping fish. These nets are made of different sizes of mesh and different materials of wire for different fishing objects. At the same time, as the development of fishing nets, various fishing tools are also produced, such as fishing cages and quadrilateral nets, which are commonly used fishing tools.