Using satellite observations and reanalysis data，this paper reveals a process that a sea surface temperature front associated with the East China Sea Kuroshio (the Kuroshio front)induces low clouds within the atmospheric boundary layer (ABL)to evolve into convective clouds，which leads to heavy precipitation on 30 April 2018． The results are shown below． (1)At 12：00 UTC 29 April，500 hPa is controlled by a shortwave trough，while low altitude is dominated by southerly air flow between high and low pressure in the East China Sea． ABL above the Kuroshio front is stable，inducing the development of low clouds． (2)The warm flank of the Kuroshio front acts to destabilize ABL through delivering heat and moisture to the air，while the cold flank has a significant cooling effect on the air，strengthening the stability of ABL． (3)After about 12 hours，modifications of surface wind speeds are induced by the Kuroshio front through vertical mixing mechanism，resulting in the formation of wind speed convergence over the Kuroshio front． Superimposed with the background field，it generates a prominent enhancement of the convergence． (4)Moreover，the air over the Kuroshio front gets warmer and moister by advection， lowering the lifting condensation level． (5)The positive feedback between latent heat release and surface wind convergence promotes the growth of deep convective clouds with significantly enhanced precipitation intensity eventually．