Face-gear isothermal point contact elastohydrodynamic lubrication model is established. Oil film thickness and pressure of the gear is calculated by FORTRAN programming. The influences of small gear rotatory speed, load of face gear and lubricant viscosity on the lubrication characteristics of face-gear are analyzed. The results show that the oil film thickness increases with the increment of rotatory speed and oil viscosity, and the film thickness becomes smaller as the load increases. The secondary pressure peak appears more obvious with the increase of rotatory speed and lubricant viscosity, and along with the increase of load, it tends to disappear.