The problem of event-based finite-time state estimation is investigated for Markovian jump systems with quantizations and randomly occurring nonlinearities. H∞ The event-triggered scheme and the quantization strategy are introduced into the model of MJSs. Sufficient conditions are derived which can ensure the estimation error dynamics stochasticH∞ finite boundedness. H∞ On the basis of the obtained sufficient conditions, a state estimator is designed for MJSs with randomly occurring nonlinearities.