Labyrinth seals dynamics coefficients and eccentric are solving by numerical methods and commercial CFD (computational fluid dynamics) program. Computer solution time, flow field pressure distribution and labyrinth seals force under five different eccentricities and five different whirl speeds are researched in this paper. Effect of labyrinth seals leakage and dynamics coefficients are also studied by numerical methods. The results show that the method can calculate labyrinth seal leakage and dynamics coefficients under different conditions. It gets that pressure and labyrinth seals force will increase with eccentricity increasing, and labyrinth seals force increase with whirl speed increasing. Leakage influencing change rate of seal length, seal gap, sealing pressure are 6.62%, 65.21% and 69.97%, indicating that seals gap and seals pressure are important impact factors to leakage change. Increasing labyrinth seals pressure and labyrinth seal length is not conducive to seal-rotor system stability, and increasing the seals gap can make seal-rotor system stability by dynamics coefficients affect analysis.