Based on the pronounced thermochromism of VO2,the transmittance and the reflectance of Au/VO2 double-film nano array were calculated with a modificatory Sellmeier dispersion model and finite difference time domain method. The simulated results show that there is a reversal effect,and the reversal effect is depended on the pitch between particles,the thickness of film and the radius of particle. When the pitch becomes large,the peak position of transmittance appears red-shift,and the transmittance reversal difference of Au/VO2 double-film nano array obviously increases. The reversal effect will disappear with the pitch further increasing. When the thickness of Au/VO2 decreases,the transmittance will increase,and the reversal difference will change. The difference of transmittance is bigger with the radius of particle increasing. However,the reversal effect is not obvious while the size of nano particle is futher increasing. By optimizing the pitch,the thickness and the radius of the particle,there is the best reversal effect with 9.8 nm pitch,110 nm thickness of Au and VO2,and 58 nm radius at 690 nm. The relative difference of transmittance can reach up to 91%,and relative reflectance difference can arrive at about 90%.