A rapid and accurate model used to study microscopic imaging through turbid medium is presented which combines traditional Monte Carlo with two dimensional point spread function (PSF). The research shows that the rapid model is much faster than a pure Monte Carlo method with the help of convolution operation, when it is used to simulate multi photon excitation (MPE) fluorescence scanning microscopic imaging through turbid medium. Besides, one run instance illustrates that higher transverse resolution can be obtained in imaging through turbid medium by MPE than by confocal fluorescence microscopy.