The invention discloses a QoS control oriented ultra-high voltage power network system protection service path planning method, belonging to the technical field of electric power information communication. The specific technical scheme is as follows: step 1, defining the QoS parameters of the system protection service; 2, modeling the UHV power network service path planning problem for QoS control; Step 3: QoS control planning algorithm based on differentiated primary paths and standby paths. The invention combines the characteristics of cross bearing of UHV power network service communicationpaths, and proposes a QoS control oriented UHV power network system protection service path planning method. Firstly, the node and link risks are considered, and two QoS indices, network comprehensive risk and network similarity, are proposed. Furthermore, a risk minimization model is constructed for the primary and secondary paths of the business. Then, a master-backup path QoS control planningalgorithm based on differentiation is proposed for the model, which realizes the independent master-backup path planning satisfying various QoS parameters.