The main issue in the change of climate conditions, especially the changes in climate extremes, is its irreparable impact on nature and human life, therefore, it is necessary to examine their changes and present reliable Predicting s of the future for climate change adaptation planners. In this research, the daily Precipitation data of the synoptic stations of Rasht, Anzali, Masuleh, Astara, Manjil, Jirandeh, Dilaman and Rodsar were obtained from the Meteorological Organization and for simulating the Precipitation in the period of 2021-2060 from the CanESM5 and MPIESM3 models and the scenarios SSP1-2.6, SSP2-4.5, and SSP3-7, and to check the rainfall intensity, the indices of one-day maximum rainfall (RX1day), rainfall intensity (SDII), precipitation of very wet days (R95P) and precipitation of extremely wet days (R99P) were used. The results showed that on an annual scale, the SDII index increases in the province, in Jirandeh (23%) and Dillman (17%) stations, the amount of this increase is higher than the coastal strip. RX1day will grow at an average annual rate of 12%. The amount of changes in different stations in different months is different and will increase the most in coastal areas in autumn and August; But in Jirandeh and Dilaman stations, the biggest increase will take place in summer. R95P will decrease by about (15%) in Manjil, Lahijan, Dilaman, Jirande and Astara stations on an annual scale. In most stations, the value of this index will increase in July and August and decrease in winter. R99P will generally increase; But this amount of increase will be more in the coastal strip and in summer and autumn. All these results indicate the concentration of rains in the coming period and the increase in the occurrence of heavy rains in Giulan.