Abstract: In consideration of the whirling motion of the floating-ring,the distribution of the oil pressure of the outer squeeze film and the inner squeeze film was studied in this paper. Based on Hirs'bulk flow theory,Moody' frication factor equation and the generalized incompressible Reynolds equation,the transient governing equations of the inner and the outer squeeze film and the equation of the motion of the floating-ring were set up. Using a numerical example,the relationship between the whirling motion of the floating ring and the distribution of the oil pressure was discussed. The result shows that the procession radius decreases as the eccentricity of the rotor increases,and the positive oil pressure zone moves in circumferential direction.