A photo temperature numerical model related to winter wheat producti vity was established, which included development stage,photosynthesis,respirati on,partitio ning of carbohydrate and consenescence of winter wheat.The simulation result of the winter wheat photo temperature productivity in Huang Huai Hai Region by using the model indicated that:(a)The productivity changed from 9 000kg/ha to 1 0 950kg/ha in the region,and the highest value was found in Shijiazhuang Area of Hebei Province and Jiaodong Area of Shandong Province. (b)The winter wheat phot o temperature producti vity was interrelated well with the solar radiation accumulated from 10 days be fore heading to maturity. (c)Analysis of the photo temperature productivity by using the power spectrum found that the change of the productivity in Beijing Area has 4 year and 9-10 year cycles.