The invention discloses a soil environment quality monitoring method and belongs to the technical field of soil environment monitoring. The method comprises steps of S1, performing soil sampling and point selecting; S2, sampling and storing the soil; S3, pretreating a soil sample; S4, preparing sample solution; S5, detecting the sample; and S6, analyzing the detection result. The method is advantaged in that a sampling point of the soil is selected through a pollution source and the underground water flow direction, after the pollution source is determined, an intersection point of routes through which the underground water flows is selected as a sampling point in a circle drawing manner, so influence of the underground water on pollution propagation can be analyzed, the contaminated areacondition can be determined, an upper-layer, middle-layer and lower-layer sampling method is adopted during sampling, three samples are respectively collected at one sampling point, the contaminated depth of the soil can be analyzed and determined by measuring and comparing the contaminated conditions of the three samples, and monitoring of the soil environment can be comprehensively mastered.