In order to improve the consumption level of distributed power in the park and reduce the volatility of purchased electricity, this paper proposes a differentiated time of use pricing method for park users based on source-charge interaction. Firstly, the process of time-of-use pricing for differentiated users is designed, and the interactive mode between electric vehicle users, electric refrigeration users and electric heating users in the park and distributed power supply is analyzed. Then, based on the equivalent load curve formed by the interaction between different user loads and distributed power supply, fuzzy membership function is used to divide the peak and valley time periods; Finally, the pricing optimization model of time-of-use is built to form a differentiated time-of-use scheme for users. According to the analysis of calculation examples, the time-of-use differential pricing scheme can effectively improve the demand response level of different users, so as to promote the local consumption of distributed power in the park, and improve the friendliness between the park and the external power grid and the economic efficiency of users in the park.