[en] The paper introduces the principle of using the streak camera to measure the longitudinal distribution of the macro pulse derived by the pulse stacking method. The hardware configuration of the measurement system and the principle of pulse stacking are presented, and the software measurement procedure and user interface are described. The measurement results show that, when the FWHM of the original pulse is 3.82 ps, the FWHM of the stacked macro pulse is 15.3 ps; the plat-top width of the stacked macro pulse is 11.5 ps, and both the rise edge and the fall edge are 1.9 ps. (authors)