To address the threats and challenges posed by offensive hypersonic aircraft, this paper proposes a distributed, high-speed, and highly maneuverable target cooperative encirclement strategy based on coverage theory. Initially, considering the maneuvering characteristics of both the aircraft and the target, the concept of Apollonius circles is introduced to delineate the encirclement region. By taking into account the target's escape boundaries, the optimal initial number of aircraft is determined, and a formation for encirclement is designed to ensure comprehensive coverage of the target's escape boundaries by multiple aircraft. Subsequently, building upon this foundation, a distributed cooperative guidance law for encircling high-speed, highly maneuverable targets is devised. This law enables the defensive aircraft cluster to adaptively adjust and maintain coverage of the target's escape boundaries, effectively preventing the target from escaping once encircled by the aircraft.