The utility model discloses a slight impact wear test device for a heat transfer tube of a steam generator of a nuclear power plant. The slight impact wear test device consists of an electromagnetic vibration excitation driving device, a leveling lifting device, an environment control device, a data acquisition control system and a frame, wherein the main structure of the electromagnetic vibration excitation driving device is as follows: an electromagnetic vibration exciter is hung below a middle beam of the frame, the end part of the electromagnetic vibration exciter is connected with an upper fixture for clamping a block-shaped upper test piece through a force transducer, one end of a non-contact type displacement sensor is fixed on the upper fixture, and the other end of the non-contact type displacement sensor is fixed on the vibration exciter; the structure of the leveling lifting device is as follows: a V-shaped groove lower fixture for clamping the heat transfer tube of the steam generator is fixed on an electric heating plate, and the bottom of the electric heating plate is connected with a base through a heat insulation plate, a lifting platform, a leveling platform and a transition base in sequence. The test device disclosed by the utility model can simulate the slight impact wear of the heat transfer tube of the steam generator of the nuclear power plant more effectively so as to provide an accurate and reliable test basis for the design, manufacturing and maintenance of the heat transfer tube of the steam generator of the nuclear power plant.