In order to study the sources of heavy metals in the topsoil of Zibo City, correlation analysis and factor analysis were used to analyze the data of sample points. Among them, correlation analysis is used to judge the linear relationship between the two variables. The larger the correlation coefficient is, the more relevant the two variables are. In this study, it can indicate that the pollution source and pollution degree may be similar or the same. Except for Cd, the other three elements were significantly correlated with each other (P