Possible extensions of the Higgs sector can be searched for a wide range of parameter space in the high energy proton-proton collisions. The searches of the heavy Higgs bosons have special challenges at present high energy colliders. One of the future international projects currently under consideration is the Future Circular Collider (FCC) which has the potential to search for a wide parameter range of new physics. The FCC-hh collider is to provide proton-proton collisions at nearly an order of magnitude higher energy than the LHC. We have studied the production and decay of charged Higgs boson at FCC-hh with a center of mass energy of 100 TeV, which extends the parameter space of Higgs sector with a high luminosity of 500 fb^(-1).
The decay modes of the charged Higgs boson can be well similar to the background reactions from top and bottom quarks and other sources. The charged Higgs boson signal can be distinguished from the background for m_H up to 2 TeV.