Searches for beyond the Standard Model (BSM) Higgs bosons are presented, particularly in the context of MSSM and Higgs Triplet Model, including a neutral Higgs boson decays into two tau leptons, charged Higgs bosons in decays of tau lepton and neutrino, charged Higgs bosons in decays of vector bosons, and doubly-charged Higgs boson in three and four lepton final states. The data is collected with the CMS detector at the LHC which corresponds to integrated luminosities of 2.3 and 12.9 fb$^{−1}$at center-of-mass energy of 13 TeV in 2015 and 2016, respectively. No signature of BSM Higgs boson is observed. The upper limits are placed on the cross-sectiontimes branching fraction for each search, as well as interpreted in different models of an ...