The utility model discloses a dip angle display for integral replacement lifting monitoring of a nuclear power plant in-service steam generator. The dip angle display comprises a base body and a pointer, wherein the pointer comprises a fixed end and a free end. The fixed end is assembled on the base body, and the free end points to a scale mark arranged on the base body and can freely rotate around the fixed end. According to the dip angle display for integral replacement lifting monitoring of the nuclear power plant in-service steam generator, in the lifting process, if the base body inclines or is shifted, the pointer can always keep downward vertically under the effect of gravity, an angle in an opposite direction can be generated due to relative position changes of a lifting appliance, is a lifting stressed dip angle and can be read directly on the dip angle display, designated people in charge of monitoring on the lifting site can master lifting dip angle control at any time, and dip angle changes in the lifting operation process are monitored effectively in real time.