  We used the Laguerre polynomials method for determination of the proton
structure function in the valon model. We have examined the applicability of
the valon model with respect to a very elegant method, where the structure of
the proton is determined by expanding valon distributions and valon structure
functions on Laguerre polynomials. We compared our results with the
experimental data, GJR parameterization and DL model. Having checked, this
method gives a good description for the proton structure function in valon
model.
