This paper focused on finite element model updating of an airbag cushion landing system. First, Typical finite element model of an airbag cushion landing system was developed. Since Structure model and the airbag model was independent with each other, a systematic model updating strategy was proposed, and precisely for this reason model updating of the recovery module structure and the airbag system were conducted individually. Impact response at key points was introduced here to avoid trouble caused by difference of the sampling frequency and trigger of the test and simulation. Confidence factor ofSthe impact response was defined here to evaluate the matching degree of simulation results and testing results. Error norm of the testing data and simulation results at key points was defined as updating objective, and augmented radial basis functions were introduced to construct agent model of the error norm. Since minimum error norm would lead to ideal model parameters, model updating problem could be transformed into an optimization problem. Impact test of a typical airbag cushion landing system was conducted, and the corresponding simulation was conducted too. Method presented in this paper was demonstrated through comparison of the test results and simulation results.