Crystal orientation degree of the Nylon 6 films treated by drawing and heat treatment was investigated in this study. The Nylon 6 films were extruded at 245℃, and then were drawn to three times by a strength testing machine, and were heat treated at 80℃ with 24 hours. Two-dimensional X-ray diffraction was used for studying the crystal orientation degree of Nylon 6 films. The results showed that the orientation factor (f) of Nylon 6 films, which were drawn first and then heat treated, were up to about 0.90. Moreover, crystal orientation degree of the films was approximately 88%, which was calculated by the azimuth angle.