Molten salt oxidation is one of the most promising alternative to incineration that can be used to oxidatively and efficiently destroy the organic components of mixed and hazardous wastes. The basic concept of molten salt oxidation is to (1) introduce wastes and air into molten salt bed, (2) oxidize organic wastes in the molten salt bed, (3) retain inorganics in the molten salt, and (4) remove the salt for disposal or for processing and recycling. In this of study, pressure fluctuation signals from a molten salt oxidation reactor(0.076m D.×0.653m H.) have been analyzed by adopting the stochastic method, to characterize the two-phase(air-molten salt) flow behavior. Effects of input air flow rate(0.05～0.22m/sec) and molten salt temperature(870～970℃) on the characteristics of the pressure fluctuation, phase space portraits and Kolmogorov entropy have been studied. The attractor which has been constructed with the optimum choice of time lag has been utilized to predict the flow behavior of gas-liquid flow in the molten salt oxidation reactor. The Kolmogorov entropy decreased with increasing molten salt temperature but increased gradually with increasing gas flow rate, however, it exhibited different tendency with the flow regime. It has been found from the results of this study that the phase space portrait, Kolmogorov entropy can be utilized to describe and explain the system turbulence and non-linear dynamic behaviors of two-phase flow in molten salt oxidation reactor.