The geometric relations of pad on tilting-pad bearing were studied,the relationship between tile pendulum angle and structural parameters were established by the oil-film force model of finite length tilting pad bearing and equilibrium equation,and the basic law of tile pendulum angle change was analyzed.The study shows that the tile pendulum angle is determined by the pad structural parameters,the eccentricity ratio of tilting pad bearing and the clearance ratio,but independent of shaft rotating speed,viscosity of lubrication oil,etc.A case study of a tilting pad bearing with 80 deg pad arc angle,0.5 offset was performed to illustrate the law of tile pendulum angle varies with eccentricity ratio and clearance ratio.It is revealed that,when the structural parameters of tilting pad bearing are constant,the tile pendulum angle increases first and then decreases with the original eccentricity ratio increases,and increases linearly with the increasing of bearing clearance ratio.