A method that can generate all kinds of nonorthogonal polarization states is induced for long distance and high bit rate generation quantum key distribution. T he polarization states are synthesized by two linearly polarization states contr olled by phase modulator. The modulator is allowed to produced non-quarter_wave phase delay so that can compensate the influence of birefrmgence during transmis sion throuogh the fiber. The structures of the encoder and the decoder based on the method are also described that can effectively reduce the bit error rate.