The most biological tissues are a kind of turbid media. After transmitting through the turbid media, the laser pulse energy will be attenuated and the pulse shape will be changed by scattering and absorption. Besides, the ultrashort laser pulse will be widened by the diffusive scattering. The various medium parameters have different influence on the transmission of the laser pulse. Based on the diffusion approximation theory, this paper researched quantitatively the influence of the thickness d, the absorption coefficient μa, the scattering coefficient μs, and the anisotropy coefficient g on the ultrashort laser pulse transmission througt turbid media.