The glue filling process has been widely used in oversize optical-bonding， but the lack of theoretical research on its process parameters makes the verification more complicated. In this paper， under the premise of reasonable assumptions， a theoretical calculation model was proposed based on the basic equations of fluid dynamics， and it was simulated by numerical analysis software. Finally， the optimal parameters of the process were obtained. The results showed that the designed theoretical calculation model was basically consistent with the actual flow pattern， and the glue filling time had an error of 10 s， which could meet the actual and practical accuracy requirements. The model could be used to explore the variation law of the glue filling process parameters， so as to quickly determine the best solution to process parameters.