Abstract:In this paper, a new comprehensive growth model derived from growth accelaration in the light of a concise biological principle was presented. The new model not only indicates the named Richards, Gompertz and logistics growth models as its special cases, but also includes many other growth models such as linear, quadratic and exponential ones. By simple variance analysis, the observed data can be used direcly in deciding the model which is most appropriate through the new model with statistically stale parameters. It, therefore, has a practical and applicable value.