Abstract: Accident of two phase release frequently happens in the chemical, petrochemical and petroleum industry. So accidental release of toxic or flammable chemicals were concerned. In this paper, an Eulerian-Lagrangian approach with two-way coupling was adopted to deal with the dispersion of propane when the breach was occurred in the liquid part. The stochastic model and particle cloud model were utilized to model turbulent dispersion of droplets, which was compared with the results obtained by deterministic model. The mathematic models and calculated results were given, and compared with the experimental data. It is shown that stochastic model can describe the droplet turbulent dispersion and is suitable for two phase jet dispersion with droplet vaporization.