The invention discloses a method for determining resident capacity per household classification threshold values based on marketing data and statistics. The method includes the steps of: 1. according to relevant parameters in a marketing data sample, calculating a value of resident capacity per household of each transformer area, and embedding resident capacity per household in an original transformer area information record, thereby forming a new data sample; 2. based on the new data sample, adopting a statistical method to determine a distribution situation of resident capacity per household of each transformer area; and 3. determining resident capacity per household classification threshold values of transformer areas of different consumption levels. Through the statistical method, the method for determining resident capacity per household classification threshold values based on marketing data and statistics searches for distribution laws of resident capacity per household of transformer areas in a large amount of data, and uses contour values of concentrated distribution of resident capacity per household of the transformer areas as classification threshold values for dividing transformers areas of different consumption levels, thereby facilitating fine classification management of transformer area line loss by State Grid electric power companies, and the method has certain rationality and relatively strong practicability.