In these proceedings, the recent measurements of the CP violating phase $\phi_{s}$ in $B^{0}_{s} \to J/\psi \phi$ decay using the data collected by CMS experiment at LHC between the years 2017 and 2018 have been presented. The obtained results are combined with the previous CMS measurements, which is also discussed in this paper. Then the measurements of angular parameters in $B^{0} \to K^{*0} \mu^{+}\mu^{-}$ , $B^{+} \to K^{+} \mu^{+}\mu^{-}$ , and $B^{+} \to K^{*+} \mu^{+}\mu^{-}$ decay modes using the data collected by CMS experiment in 2012 are presented.