Abstract: The time-integrating acoustic-optical correlator was used to capture long codes. The additive time-integrating acoustic-optical correlator was used as the experimental model. The experimental model was devided into four parts: light source, splitter, beam expansion and detector array parts . Through the analysis and calculation for each part, the optimum experimental model was established. The experiment of time-integrating acoustic-optical correlator was finished by use this experimental model, and the result was analyzed. It is the first time the experimental model of time-integrating acoustic-optical correlator was finished in our country and at the end of this paper, the satisfied experimental results in our laboratory were given.