Abstract: In order to study the influence of sowing date to different seed-type seeds of peanut cultivars’ development rate and the relationship with meteorological eco-factors, this study used two randomized factor to design the experiment. The comparison was tested by four varieties of peanuts including small seeds, medium seeds, medium-large seeds and large seeds and five different sowing times. The results showed that: four varieties of peanuts’ early and mid-season development progress were extremely significantly or significantly influenced by sowing date, weather conditions were similar in the late development stage, so the development days during this time was similar between four varieties of peanuts. The decisive meteorological ecological factor to the days of sowing to emergence was total accumulated the temperature, the second factor was the temperature index, While the influences of precipitation and sunshine time was not significant. The days of emergence to flowering stage is decisived by the temperature index and total accumulated temperature, followed by precipitation and sunshine hours. The decisive meteorological ecological factors to the days of whole development stages were temperature index, total accumulated temperature and sunshine hours,the influence of precipitation effect was not significant.