The main principle, characteristics, adaptation conditions and development tendency of the trenchless recovery technology for drainage pipes are introduced, including the integral recovery technologies of inverted in-situ curing, ultraviolet light in-situ curing, in-situ thermoplastic modeling and segment lining recovery, and the local recovery technologies of local resin in-situ curing and stainless steel double expansion ring. Combined with a practical engineering case, the detailed application conditions and implementation effects of trenches recovery technologies are introduced, which can be referred for the similar projects.