Abstract: In order to study gas pressure visualization during coal and gas outburst, physical simulation experiment was carried out by the independent research and development of multi-field coupling testing system for dynamic disaster in coal mine. The interrupt process of the inner surface of the axis and the fracture surface of spatial and temporal distribution patterns of the pressure were obtained based on Matlab data visualization program. The analysis results are as follows: after the occurrence of the outburst, inner pressure near the outbust mouth of the coal body first begins to drop, the time of pressure drop was delayed in the distant coal body; different cross-sections within the horizontal longitudinal axis of the pressure with the development of outbust shows a symmetrical distribution, and the outbust port of the axis position corresponding to the pressure decreasing rate is faster than the pressure drop rate of the both sides; the pressure in the section is approximately funnel-shaped, and the corresponding projection pressure cloud is circular, which verifies the hypothesis of “spherical shell destabilization” of outbust in a certain extent.