Through testing heavy metal elements’ and useful elements’ content in soil of Chengdu Economic Area, this paper, referring to relative national or industrial standard, carried through geochemical gradation based on soil environmental quality and nutrient quality, and finally evaluated the soil quality from geochemistry. The results indicated as follows: the soil quality of Chengdu Economic Area mainly belonged to the third and fourth grade, taking up 56.05% of the survey area. Such soil was comparatively clean and with relatively enough nutrients, suitable for agricultural producing. The next was soil of the fifth and sixth grade quality, accounting for 39.02% of the whole area. Such soil was polluted in different degree and was of few nutrients, so required more management. The area of soil of the first and second grade quality accounted for only 4.95%.Such soil was ideal for developing green or pollution-free agriculture, and should be protected and utilized reasonably.