The article takes a careful study on calculation model and method of the take-off track on the basis of certam alrcraft. It also uses the results derived from the model and method to compare with the results of the flight test of a certam alrport. The result shows that the calculatlOn data of the take-off track of the glven quality and the alrport condition are basically in accordance with the testmgtake-off result. It indicates that the model is reasonable , the method is correct and the data are preClse.