Taking Fuchun River pipe jacking engineering as an example, this paper introduces a quick-detachable device for local damage on pipe section in deep buried pipe jacking tunnel, which has simple and compact structure and is easy to be assembled in the tunnel with circular cross-section. With the maximum tolerance of water pressure of 0.8MPa, this device can repair damaged pipe section less than 0.4m along the axis at 30~80m below the groundwater level by grouting in pipe jacking tunnel to effectively deal with small area local damage and small scale water leakage & sand gushing, and it can provide emergency repair supports for circular cross-section tunnel constructed with pipe jacking method.