The handoff algorithm is one of important technologies on VHF/UHF Data link to enlarge the concerned field of the aircraft.Focus on the disadvantage of the present algorithm on VHF/UHF data link and the analysis of the common detection algorithms and the characteristics of VHF/UHF data link.The paper proposes a new handoff algorithm based on data fusion to improve reliability and seamlessness of communication on striding areas.The algorithm makes the probability of false alarm and missed detection smaller
and the ground-to-air communication more reliable.