At the top of Dushan Mountain with an elevation of more than 1 840m in the east part of Hebei Province, China, the authors discovered a peculiar weathing products resulted probably from thunderstorm and observed the thunderstorming process with their own eyes for the first time. The weathering boulders probably formed by thunderstorm are accumulated in an area of more than 10km long, 30-50m wide and 10-30m deep pile on the top of Dushan Mountain. The diameter of the boulders are usually 2-3m and may reach a maximum of more than. 10m. The physical basis of thunderstorm weathering is analysed. The energy needed to fracture granite of 1 m3 in volume was provided theroretically calculated to be 0.07%-0.007% of the energy released from a thunderstorm. The regularity of tempo-spatial distribution of thunderstorm weathering is set forth. Thunderstorm weathering is supposed to mainly happen at the low-latitude near-sea mountainous areas. The Archean hydrogenic sedimentary series indicates the accomplishment of the earth's hydrosphere and probably also the beginning of thunderstorm weathering. In the history of our earth, the periods with rich rainfall and warm climate would be also the periods with more thunderstorm weathering, such as the Archaeozoic, Mesoproterozoic, Cambrian, Ordovician and Tertiary. It is put forward that some of the disputed glacial boulders in middle-lower mountain areas in eastern China might be the result of thunderstorm weathering, and these boulders might have been carried to the foot of these mountains or even farther by mud-rock flows and deposited there; for the glacial areas such as Lushan Mountain in Jiangxi Province and Shahe in Hebei Province are all the low-latitude near-sea mountainous areas where thunderstorm weathering was more liable to take place.