A scheme of strong coupling between the double electron spins and the quantized nano-mechanical harmonic oscillator is proposed based on the diamond nitrogen vacancy(NV)color center.A two-dimensional entangled state of two qubits is prepared by using the dissipative process of the nano-mechanical harmonic oscillator.The numerical simulation results show that,all the systems with different initial states can evolve to the target states with a high fidelity and a high entanglement.This scheme reduces the infl...