The expression of the light field distribution in the image plane of the converged-spherical waveincident two-dimensional amplitude grating in Fresnel diffraction region was derived by using the Fouriertransform and Fresnel-Kirchhoff diffraction theory. And the imaging conditions as well as the imaging law areanalyzed. The Talbot effect is observed by experiment,and the average error between the measured data and theheoretical value is about 4.6% which verifies the correctness of the derived formula. The results of the study improve the theory related to the Talbot effect and have certain reference value for its application expansion.