Abstract: The probability density function (pelf) methods to solve the joint pdf equation of velocity and thermo-chcmical parameters for turbulent combustion are very promising, because the turbulent transfer and chemical reaction can beciliated correctly. IT can provide more information than other conventional turbulent models. In this paper the evolution equations for pdf of turbulent combustion arc derived. Some common stochastic models and Monte Carlo algorithm for solving the pdf equations are introduced. Two ex...