According to the importance of electromechancial behavior of bone on clinical medical treatment, the physiological structure of bone tissue is studied. Then the biphasic porous media theory associated with electro kinetics is used to model the electromechanical effects in bone tissue. The finite element governing equations are built up through Galerkin method and the penalty method. The distortion of skeleton, interstitial fluid flow and the streaming potential in bone tissue are numerically computed and simulated.