Measurements of CP violation in B0s mesons decays provide an
excellent method to test the prediction of the Standard Model and search for effect of new physics beyond it. With the first 1 fb−1 √ of data collected in pp collisions at
√s = 7TeV the LHCb experiment performed the world best precision measurements of the CP-violating phase φs and on the decay width difference ΔΓs. The analysis of the B0s → φφ decay and the measurement of the B0s lifetime in decays to CP eigenstates are also presented