The invention provides a method for building a fishpond protecting slope. The method comprises the following specific steps of: (1) building the fishpond protecting slope according to the ratio of height to bottom length, i.e., 1:(1-1.5); (2) making 370*370 mm rectangular feet by using concrete at the bottom of the fishpond protecting slope; (3) laying reticular
glass fiber geogrids along the fishpond protecting slope, and burying 30-40 cm reticular
glass fiber geogrids below the foot part, laying the reticular
glass fiber geogrids to 20-30 cm at the top end of a pond
ridge at the upper part,and compacting the geogrids by using compression concrete; (4) spreading 0.5-1 cm floating soil on the laid reticular glass
fiber geogrids, and compacting the floating soil with small force; (5) planting herbaceous plants with prosperous root systems on the laid interface, and
cutting surface plants along with the interface after the herbaceous plants grow mature naturally; and (6) after the surface plants are
cut, introducing water into the fishpond normally to perform
aquaculture production. Through the method, the collapse problem of the fishpond
ridge in China is solved, the service life of the fishpond is prolonged, the production efficiency is increased, and the
ecological environment of the original pond is maintained.