Abstract: 【Objective】 This study aims to estimate chilling and heat requirements and relationship between them for new peach cultivars and explore the feasibility of dynamic model in Zhengzhou area. 【Methods】 Chilling and heat requirements were studied in 23 peach cultivars by using four different models(≤7.2 ℃ model, 0-7.2 ℃ model, Utah model and Dynamic model)for estimating chilling requirement and two different models ( Growing degree hours model and Effective temperature model ) for estimating heat requirement, and correlation between chilling requirement and heat requirement were established by combining the ‘chill R’ package in R studio. 【Results】 There were significant differences in chilling requirement among the 23 new varieties,between 631.5 h and 1,162.0 h(≤7.2 ℃ model)or between 501.5 h and 886.0 h(0-7.2 ℃ model)or between 525.0 CU and 836.0 CU (Utah model)or between 27.7 CP and 46.3 CP (Dynamic model). The heat requirements ranged between 127.3 D℃ and 257.3 D℃(Effective temperature model)or between 4,004.7 GDH℃ and 6,898.0 GDH℃ Growing degree hours model (GDH). Although the chilling and heat requirements of peach were not necessarily related to the fruit ripening period, there was a positive correlation between the chilling requirement and the effective accumulated temperature model. Under the dynamic model, the chilling requirement had a high correlation with other models. 【Conclusion】 Among the 23 new peach varieties, the moderate chilling requirement accounts for about 65%, which can be planted in most suitable cultivation areas such as Yangtze River Basin and Yunnan-Guizhou Plateau of China. The dynamic model is feasible to evaluate the chilling requirement in Zhengzhou area.