Abstract: Abstract：The paper focuses on the urgent technical issues arising in multi-purpose geochemical survey in plain areas.Based on the data of experimental study, the method for anomaly inspection and ecological appraisal of multi-purpose geochemical survey in plain areas is proposed. In the stage of anomaly inspection, the correlatiom method should be used to determine the geochemical base lines of the anomalous components first, and then classing of anomalies is made to make sure the origin and genetic mechanism of anomalies and provide a theoretical basis for the appraisal of anomaly ecological effect. In the stage of anomaly ecological effect appraisal, it is necessary first to make clear the correlation between the total content of anomalous components and their active components in soil, then to investigate the content correlation between the anomalous components in soil and crops and finally to evaluating the content of heavy metals in crops and their harm to human health through the food chain according to the relevant standards.