Abstract: A kinetic rnodel,constructed on the reaction mechanism,is developed for predicting both the vields and the properties of hydrocracking products. A MHC experimentaldata in the literature is examplified and accepted to estimate related kinetic parameters.Thestandard devlation of the model is also given. It is indicated that the predictive capacity fromthe kinetic network,which has been described,is acceptable for hydrocracking of heavypetrcieum fractions.