The invention discloses a tofacitinib intermediate, a crystal form and a preparation method thereof, the tofacitinib intermediate is a compound shown as a formula VI. The positions of characteristic diffraction peaks of the intermediate in an X-ray powder diffraction pattern when the reflection angle 2theta is about 7.4 DEG, 10.0 DEG, 11.8 DEG, 14.6 DEG, 16.3 DEG, 19.0 DEG, 19.3 DEG, 20.5 DEG, 23.8 DEG, 24.2 DEG, 25.2 DEG, 25.8 DEG, 26.0 DEG, 27.0 DEG, 28.0 DEG, 28.3 DEG, 28.9 DEG, 29.3 DEG, 31.2 DEG, 31.7 DEG, 32.1 DEG, 34.4 DEG and 38.2 DEG. The formula VI compound is stable and easy to store and transport.