Quantum mobile communication with superiority of flexibility, high efficiency, security and confidentiality is a kind of new communication technology connected quantum mechanics and mobile communication. A kind of entanglement signaling handover strategy among different sector antennas in the same cell is put forward based on the entanglement degree calculation. The relationships between quantum mobile communication terminal and sector antenna with variable distance and angle respectively are studied, and the entanglement signaling the handover strategy is simulated and analyzed. The simulation results show that the proposed handover strategy has high reliability, which has a great technology supporting function for the future quantum mobile communication system and its standard formulation.