The Z boson production in association with two b quarks is studied as a benchmark for MSSM bbH production with H->tautau decay in CMS. An analysis using Z bosons in real data can be used to test the methods and techniques needed for reconstructing the Higgs boson. The bbZ measured from data can be used to verify the theoretical predictions for the cross section, and Z boson and b quark transverse momentum distributions. Understanding the bbZ production at LHC helps us to understand and better trust the predictions for the associated Higgs bosons production
