The upgraded CDF detector is now collecting data with the aim of integrating 2 fb^-1 by year 2005. The pursued B physics program is very appealing. CDF will provide measurements of various CP violating and B mixing parameters which both complement and extend B-factories measurements. In addition there is a variety of spectroscopy measurements on B_s and heavier B hadrons which are currently accessible only at the Tevatron. In this talk we give a description of the new CDF tools available for B physics, we discuss the preliminary results obtained with the first 70 pb^-1 of data, and we highlight Run II B physics prospects.

PACS numbers: 14.65.Fy, 14.40.Nd, 13.25.Hw, 14.20.Mr