The archival memory resources of ethnic minorities in China are widely dispersed and protected by diverse subjects, which not only bring great challenges to the digital memory construction of ethnic minorities, but also provide an opportunity for relevant stakeholders to participate in the construction of memory. These subjects not only have multiple characteristics across systems, but also have great differences in memory concepts, resource storage, management methods and so on. This paper introduces the concept of "participation", investigates the construction subjects of digital memory of ethnic minorities and their mutual relations and organizational forms from the perspective of participants, and forms a multi-agent and multi-level co-construction mode suitable for China's national conditions,that is, the government's vertical management at the macro level, the horizontal collaboration of multiple subjects at the meso level, and the public network participation at the micro level. In order to achieve the goal of ''participation'' co-construction, it is necessary to implement corresponding strategies to promote it.