Integrative planting methods of Yam have been positively tested with two times rotary regression, and the modes of optimizing output has been set up. And the relationship of five testing factors was analyzed with the conception of maximum in Math and the theory of marginal utility of agricultural economics. And the relationship between harvesting the highest output, getting the highest economical effects of Yam (high quality, highest effects) and the weight of earthnut of Yam, the density of planting and the dosage of fertilization of N, P and K was calculated with the average of four factors in five factors. Our aim is to summarize the methods of high output, high quality and optimized agricultural characters.