In order to investigate the characteristic of ECMWF and CMA-SH9 models on multiple time-effect forecasts of rainstorm in summer (June to August in 2019), the object-based verification method is used to evaluate the area, location and shape of different types of heavy precipitation falling area predicted by of models about different influence systems, and the unpredictable high altitude factors and circulation influenced by westerly trough and shear line at the edge of subtropical high are also discussed in this study. The results show that, the times of forecast in rainstorm are mostly three orders of magnitude smaller. The prediction accuracy of rainstorm with multiple periods of validity about CMA-SH9 model is higher than that of the ECMWF model. The models of ECMWF and CMA-SH9 are better working in forecasting of the tropical cyclone with mid-low latitude circulation than in prediction of cold vortex, and the models of ECMWF and CMA-SH9 are worse working in forecasting of the shear line at the edge of subtropical high. When the westerly trough and shear line the edge of subtropical high edge affected, the prediction of geopotential height by ECMWF model is better than CMA-SH9. The prediction of temperature by CMA-SH9 is slightly better than ECMWF above 500 hPa, and there is little difference below 500 hPa. The forecast error of relative humidity prediction by CMA-SH9 is smaller than that of ECMWF, and the errors of 36 h and 60 h period of validity by CMA-SH9 are the smallest. In the ‘20190807’ process affected by the westerly trough and the shear line at the edge of subtropical high, the area of relative humidity above 90% predicted by ECMWF has no intersection with areas of 10 mm·h^-1 precipitation from observational data, while the area of relative humidity above 90% predicted by CMA-SH9 covers the area of 10 mm precipitation.