Digital oscilloscopes are wildly used in the pulse signal measurement field because of its measurement method easy and intuitive. By using Keysight (formerty Agilents)Technologies DSO6052A digital oscilloscopes, the paper introduces the measurement result uncertainty evaluation process on pulse signal amplitude, frequency and width in detail. The uncertainty sources of measurement result are analyzed. Then the measurement data are calculated and the expressions are given. To the evaluation result, each factor influencing uncertainty is analyzed. Finally the method to improve measurement accuracy is recommended in the paper. It is proved that the analysis and evaluation method is correct and effective in practice. Thus it can be taken as reference for composing pulse signal generator verification device standard report and uncertainty evaluation on pulse signal measurement result.