In order to study on the spatial measurement accuracy of standard laser source near-field parameters, the theoretical model of near-field intensity distribution of standard laser source is established. The surface response non-uniformity correction program of the scientific grade CCD and calculation algorithm of laser near field is proposed. Using corrected scientific grade CCD and two-dimensional scanning device, the 50 mm×50 mm soft-stop images of 1053 nm standard laser source are obtained by S-shaped scanning and capturing. The near-field image of standard laser source is got by the sub-aperture image mosaic. The test results of near-field intensity distribution are accordance with the theoretical results. The main difference between them is the high frequency components mainly caused by the roughness of off-axis parabolic mirror and random noise of the scientific grade CCD .The analysis of near-field parameters test results is that the uncertainty of modulation is 0.08 (k=2), and the uncertainty of contrast is 0.01 (k=2). The near-field measurement confidence of laser measurement system of National Science and Engineering is improved by the study results.