Accurate calculation of line transformer relationship in distribution network is the key to balance the load of distribution network and improve the reliability of line operation. For a long time

it is time-consuming and labor-consuming to rely on manual way to verify the line transformer relationship of distribution network. On the basis of big data analysis

we established a mathematical model based on the principle of electric energy conservation

and put forward a calibration method of line transformer relationship based on the data analysis of electric energy measurement management system. Through the size and change of partial correlation coefficient

the correctness of line transformer relationship was verified

and an example was given to verify. The results show that the verification method is accurate in judging the line transformer relationship of distribution network. It can greatly improve the efficiency of analyzing the massive operation data of distribution network

and solve the time-consuming and labor-consuming problem of manual mode. According to the proposed calibration method of line transformer relationship in distribution network

the data of different 10 kV lines in a substation are verified

and the accuracy is 97.8%.