A novel experimental scheme is reported about double wavelength decision using optical fiber parametric amplifier in a highly nonlinear fiber (HNLF). So multi-channels signals can be reshaped and regenerated simultaneously. This scheme is based on a coil 500 m HNLF. The input signals are two channels of 10 Gb/s return-to-zero (RZ) pseudorandom bit sequence with different wavelengths,and the pump is clock pulse with 10 GHz frequency. Parameters process of signal and pump occurred at HNLF,two idlers are filtered through two different center wavelength optical band pass filters,then the all-optical decision is realized. In the experiment,two channels of 10 Gb/s RZ are firstly deteriorated for simulating the long-haul transmission loss and distortion. The extinction ratio (ER) of deteriorated signal is respectively 9.17 dB and 8.27 dB,and the ER of decision signal is 12.8 dB and 12.66 dB. A scheme of dual wavelength all optical decision is demonstrated through the experiment.