The invention discloses an energy internet cooling, heating and power transmission energy transfer ratio friction determining method. The method comprehensively considers the following factors of theannual calculation cost of heat supply network capital investment and the annual cost of heat medium transmission and annual cost of heat loss. By establishing a heat supply energy transfer model of aheat supply pipe network, the capital investment cost of the pipe network, the electric energy cost of the heat supply pipe network and the heat loss cost are comprehensively analyzed, and the optimal economic specific friction is determined. The method ensures that the unbalance rate of the system is at a relatively low level, and is convenient to operate and debug; when the system has the problems of hydraulic imbalance and the like, the arrangement of hydraulic balance elements in the pipe network is saved, and the workload and the engineering cost of hydraulic balance calculation are reduced; at the same time, it is guaranteed that the whole pipe network can adopt domestic equipment, and the installation, management and maintenance difficulty of the pipe network system is reduced; andthe method has the obvious effects of balancing system operation and reducing initial investment of a pipe network.