The assembly，integration，and test （AIT） process is an essential part for satellite development.However，the traditional design，techniques，and manufacturing processes are too independent to satisfy the requirements of high-quality and efficient satellite development transformation.In this paper，a digital satellite AIT development model and its manufacturing collaboration scheme are proposed.Aiming at the design-transfer-collection-application stages during the AIT development，a management system is developed and applied by means of the digital techniques such as the definition and integration of the final assembly technical requirements，the structural definition of the AIT process，the standardized definition of the process state，the bidirectional transfer of the design and manufacturing data，and the collection of the manufacture-site data.With the developed system，the online parallel development between the design corporation and the assembly cooperation can be achieved，and the efficiency，quality，and stability of satellite development are improved.The practice of this model provides a practical foundation for the subsequent research on enhancing the global digital planning of AIT and addressing the weakness in the AIT business such as quality feature，comprehensive test，and state management.