A rare extensive pulse storm event that occurred under weak wind shear during July 7, 2025 in Shandong Province is analyzed by using multi-source data. The results are as follows: (1) The synoptic environment characterized by a "trumpet-shaped" configuration, dry and cold at upper level and warm and moisture in lower level, has provided favorable conditions for the event whose synoptic situation belongs to subtropical high edge type . (2) The areas affected by the severe convective are highly consistent with the distribution of high temperature in Shandong, so the high temperature has laid the necessary energy for the event. (3) The stratification over Shandong is highly unstable, with abundant latent unstable energy. Sufficient water vapor and energy sources are present, and precipitable water is high. Multiple triggering factors for severe convective weather，such as convergent shear lines, the topographic effect of Mountain Tai, and gust fronts in the near-surface layer. The environmental conditions for severe convection are favorable. (4) Pulse severe storms are developed rapidly with a short lead time for early warnings. The hazardous weather is directly caused by downbursts and gust fronts, and its characteristics are associated with the entrainment of dry and cold air in middle layer. The weak intensity and scarcity of hail observed in this event can be largely attributed to a high-altitude melting layer which resulted in the melting of hailstones during their downward trajectory.（5）The meso-scale model CMA-MESO exhibits excellent performance in simulating this process and holds high reference value. In the future, it should be made to strengthen interpretation and application of meso-scale products, and to improve monitoring and early warning capabilities for short-term and nowcasting ?by utilizing Doppler radar products.