Abstract: Soil and vegetation are always interacting and developing mutually, the study of their mutual interaction mechanism is important to soil and vegetation management. In order to better understand the formation and maintenance mechanism of yield and quality in soil-crop system and offer scientific basis for adjusting measures to local conditions, the author based on the literatures about the relationship between soil and vegetation, took paddy soil and rice as examples, analyzed the coordinated characteristics of material composition between paddy soil and rice from 3 aspects involving paddy soil nutrient, rice yield and quality and elemental information. Soil types and spatial difference of soil nutrients could make differences in rice yield. Besides, due to different nutrient elements, different soil types also had effects on the quality of rice. In recent decades, some scholars had studied the possibility of using elemental fingerprints to estimate rice producing area, although a few studies concentrated on the combination of rice element and soil element directly, they had shown that rice elemental information was related to local soil. Therefore, on the one hand, different soil types and nutrient status could affect rice yield and quality; on the other hand, the elemental composition of rice could reflect certain information of soil. This explained that paddy soil and rice in any area had its own characteristics, and it was a harmonious system.