In large envelope ranges, the dynamic characteristics of UAVs have obvious perturbation. Only if the control law is designed according to UAV's different dynamic flight characteristics, can the high-quality control of the UAV be realized. Based on the clustering partition technology and according to the similarity and continuity of the dynamic stability and maneuverability of UAV's envelopes in the regional scope, the envelope is divided into sub-envelope regions with similar characteristics. This approach provides a basis for the design and scheduling of UAV's full-envelope control laws.