The analysis results showed that after Typhoon 9608 landed on Fujian and moved northwestward,the enhance of the southeast wind and southwest wind at the east side of the typhoon,the warm moisture shear line formed over,southern Fujian,the descend of north wind at typhoon′s west side moving southward and then the enhanced moisture baroclinic front zone in southern Fujian,provided the favourable conditions for developing the mesoscale convective cloud cluster The involement of a dry tongue from northwest of the typhoon and moving southward,the small and mesoscale convergence system at surface,the surface mesoscale energy frontal zone and the special topography at southern Fujian all enhanced the development of convective cloud cluster.