The utility model relates to a disconnect -type grout clamp tip sealing device belongs to among the ocean engineering restoration of member under water and reinforces technical field. The utility model discloses can guarantee that clamp and impaired pipe fitting obtain good structure sealing nature, avoid tip grout to reveal. The utility model discloses a two and half sealing device, two and half sealing device link together, half sealing device includes the seal structure main part, outer faying face sealing washer, interior faying face sealing washer and L type sealing strip, seal structure main part surface is equipped with arc wall I, seal structure main part internal surface is equipped with arc wall II, seal structure main part bottom surface is equipped with L type groove, outer faying face sealing washer is installed in arc wall I, interior faying face sealing washer is installed in arc wall II, L type sealing strip is installed at L type inslot. The utility model discloses the underwater installation of specially adapted node clamp.