Abstract: In order to compensate transport delay of flight simulator,two transport delay adaptive forgetting factor compensation algorithms based on Kalman filter and Stochastic Approximation are presented.To improve prediction of precision and reduce errors,the time varying forgetting factor is regulated by the error,and a regulatory parameter is added in the initial parameter matrix of the two compensation algorithms,the singularity in the initial parameter matrix is avoided.The results imply that the two algorithms are superior to the algorithms of the revised McFarland and the Kalman filter compensation algorithm is the most excellent among the four types of algorithms.