Studies have shown that the photonic nanojet produced by spherical microparticle has an extremely narrow half-height width and can greatly improve the lens resolution.Microparticle preparation may result in a nonstandard microsphere,which may affect the characteristic parameters of the photonic nanojets.The characteristics of photonic nanojet (PNJ) generated by egg-shaped microcolumn are calculated by the (2D) finite difference time domain (FDTD) method.The results show that the incident and outgoing surface curvature can regulate photonic nanojet generated by egg-shaped microcolumn,the effect of the incident light wavelength and refractive index on the photonic nanojet produced by the egg shape is further investigated.This work provides the characteristic parameters of the photonic nanojet generated by egg-shaped microcolumn,which provides a reference for the future work.