Modeling and identiÿcation of non-linear hysteretic systems are widely encountered in the structural dynamics ÿeld, especially for the hysteresis with slip. A model, called SL model, which can describe the pinching of most practical hysteresis loops perfectly was proposed by Baber and Noori (J. Eng. Mech. 111 (1985) 1010). A method of estimating the parameters of SL model on the basis of input-output data based on bootstrap ÿlter was proposed by the writers. Bootstrap ÿlter is a ÿltering method based on Bayesian state estimation and Monte Carlo method, which has the great advantage of being able to handle any functional non-linearity and system and/or measurement noise of any distribution. The standard bootstrap ÿlter, however, is not time e cient, i.e., it is very time consuming and is not suitable for real-time applications. In this paper, previous work by the writers is extended to do the parameter estimation of SL model by a fast Bayesian bootstrap ÿltering technique. Simulation results are presented to demonstrate the performance of the algorithm.