Abstract: According to the characteristics of maize canopy, the plant, characteristics values including height of plant, mean leaf density and the rate of farmland coverage were chosen as the plant parameters, i. e. the multiple coefficient of vegetation to describe the feature of maize canopy based on the experiments in the maize fields for three summers from 1994 to 1996. By using the multiple coefficient of vegetation as a factor, an estimation method for albedo and net radiation of maize canopy was proposed, and the good results were obtained.