  The transverse momentum distributions of J/{\psi}mesons produced in pp
collisions at the center-of-mass energy 5 TeV, 7TeV, and 13 TeV are described
by the modified Hagedorn function. The fitting results by the modified Hagedorn
function are in accord with experimental data measured by the LHCb
Collaboration at LHC. The related parameters are obtained and analyzed.
