Accurate acquisition of dynamic pressure waveform for detonator output is the basic guarantee to well and truly estimate detonator output power. Based on the analysis for the output pressure waveforms of detonator-type detonation elements by means of manganin piezoresistance,the influences of different factors,such as sensor protective media,detonator bottom capsule shapes and fragments,on the output waveforms are explained. The investigations showed that a right full detonator output pressure waveform should consist of a steep pressure rise front and a tensile signal after the front. The period of a rise front is 10 ns. When a thinner Mylar film is used as protective medium,the pressure rise front will quickly fall to zero before reaching its peak. The protective medium using 1 mm thick PMMA film is better than that of 0.1 mm Mylar film. The pressure rise fronts of concave bottom and no bottom capsule detonators are much less steep than that of flat bottom detonator and there is a persistent period of pressure flat after their peaks. Besides,the possible bad effects from experimental system on the pressure waveform are also discussed.