多元主体的有效协同是促进青少年体育高质量发展的重要途径。运用文献研究法、比较分析法、逻辑分析法等方法对多元主体协同促进青少年体育高质量发展进行探讨。经研究发现，多元主体协同促进青少年体育发展是指各主体在青少年体育发展中形成多元参与格局、良性互动关系、良好合作秩序、系统性发展合力；科学的定位分工、有效的资源配置、合理的利益分配是实现多元主体有效协同的关键。多元主体协同促进青少年体育发展面临着体制机制不健全、联结关系松散、保障条件有待优化等困境；差异化目标和利益诉求、青少年体育发展主体的路径依赖、组织自强与外部激励双重缺失、青少年体育发展政策不完善等是导致相关困境的主要原因。研究认为，应优化青少年体育发展的顶层设计、明确各主体发展青少年体育的职能、搭建主体协同联动平台、促进主体发展能力提高、完善青少年体育治理的法规以提升多元主体促进青少年体育发展的协同水平。

The effective synergy of multiple subjects is an important way to promote the high-quality development of youth sports. By using the method of literature, comparative analysis and logic analysis, this paper explores multi-subject cooperation in promoting high-quality development of youth sports. It find that, a youth sports multiple participants development is a multi-participation pattern, a stable cooperation relationship, a good cooperation order and a systematic development synergy. Scientific positioning and labor division, effective resource allocation, and reasonable benefit distribution are keys to realizing effective collaboration among multiple subjects. Predicament of multi-subject coordinated development include institutional mechanisms for collaboration are not sound, relationships in collaboration are loose and conditions for collaboration need to be optimized. The influencing factors include: differentiated goals and demands make it difficult to establish a collaborative mechanism, the path dependence of the development subjects leads to poor sustainability, dual lack of organizational self-improvement and external incentives makes it hard to form a collaborative pattern, and insufficient policies led a low sustainability of coordinated development of multiple subjects. We should optimize top-level design of effective cooperation, clarify youth sports functions of each subject, build a collaboration and interaction platform, promote development capabilities of each subjects, and improve legal system for youth sports to optimize the collaborative level of multiple subjects in the development of youth sports