Abstract: To further explore the formation mechanism of thunderstorm and gale in Baoding and to prevent the occurrence of agrometeorological disasters in advance, based on the conventional observation data and daily NCEP/NCAR reanalysis data of 6 h, we analyzed a thunderstorm and gale occurred in eastern Baoding and Xiong’an on June 21, 2017. The results showed that: the mesoscale convergence line and cold pool were the direct trigger mechanism; there were two free convection eights (LFC) in Beijing T-lnP; the thunderstorm and gale was prone to trigger in the front area of the strongest negative temperature and positive pressure; the thunderstorm and gale was near the tongue of high energy; weak cold advection in the boundary layer was beneficial to the formation and strength of the horizontal front; the increase of negative values of MPV2 in the whole layer and the coupling of vertical helicity between high and low constituted the typical mode of the thunderstorm and gale. The gale was in front of high trough, the coordination between weather systems at the upper and lower troposphere together with instability conditions were very beneficial to the development of severe convective weather. According to the ground mesoscale system, warning signals could be sent at least 10-20 minutes in advance.