The exponential passive filtering problem for a class of nonlinear Markov jump systems with uncertainties and time-delays is studied.The uncertain parameters are assumed unknown but norm bounded,and the nonlinearities satisfy the quadratic condition.Based on the passive filtering theory,the sufficient condition for the existence of the mode-dependent passive filter is given by analyzing the reconstructed observer system.By using the appropriate Lyapunov-Krasovskii function and applying linear matrix inequalities,the design scheme of the passive filter is derived and described as an optimization one.The presented exponential passive filter makes the error dynamic systems exponentially stochastically stable for all the admissible uncertainties,time-delays and nonlinearities,has the better abilities of state tracking and satisfies the given passive norm index.Simulation results demonstrate the validity of the proposed approach. The exponential passive filtering problem for a class of nonlinear Markov jump systems with uncertainties and time-delays is studied. The uncertain parameters are identified unknown but norm bounded, and the nonlinearities satisfy the quadratic condition.Based on the passive filtering theory, the sufficient condition for the existence of the mode-dependent passive filter is given by analyzing the reconstructed observer system. By using the appropriate Lyapunov-Krasovskii function and applying linear matrix inequalities, the design scheme of the passive filter is derived and described as an optimization one. presented exponential passive filter makes the error dynamic systems exponentially stochastically stable for all the admissible uncertainties, time-delays and nonlinearities, has the better abilities of state tracking and conditions the given passive norm index. Simulation results demonstrate the validity of the proposed approach.