The invention discloses a photoinitiator containing nitro dioxime ester. The structure of the photoinitiator is represented by a general formula I shown in the specification. The photoinitiator has excellent application properties on the aspects of storage stability, light sensitivity, developing performance, pattern integrity and the like, has good adaptability to single-wavelength UV-LED (Ultraviolet-Light Emitting Diode) light sources and shows light sensitization performance, which is obviously better than that of the existing photoinitiators, under the irradiation of UV-LED.