A severe convection event of extensive pulse storm that occurred under weak wind shear on 7 July 2025 in Shandong is analyzed by using multi-source data. The results are as follows. ( 1 ) The trumpet-shaped stratification, namely dry and cold in the upper level and warm and moist in the lower level, provides favorable large-scale environmental conditions for the event, and the synoptic situation belongs to the typical subtropical high edge type. ( 2 ) The high surface temperature and dew point temperature, together with the unstable stratification in the lower and middle troposphere, lead to extremely high convective available potential energy ( CAPE ) that characterizes the potential of deep moist convection and minimal convective inhibition ( CIN ). Under the lifting effects of surface convergent shear lines, mountainous terrains in central Shandong and gust fronts, the large-scale severe pulse storm event occurs in Shandong. The hazardous weather is directly attributed to downbursts and gust fronts, while the gale disasters are associated with the entrainment of dry and cold air in the middle level. The key reasons for the weak intensity and scarcity of hails observed in this event can be largely attributed to a high-altitude melting layer, which results in the melting of hailstones during their downward trajectory. ( 3 ) The initial echoes of the storms producing downbursts have relatively high centroid height. The mid-altitude radial convergence ( MARC ) occurs later than mesoscale vortices, making the latter more effective for early warning. (4) The CMA-MESO model performs well in simulating this process and holds high reference value.