Under the framework of cultural sustainability theory, the intergenerational inheritance and innovative practices of Dai dance exhibit a dynamic balance. The "Three Bends" movement system is centered around knee resilience and wrist flexibility, carrying a symbolic expression of imitation and natural reverence for the peacock totem. Through oral transmission and physical memory, implicit cultural genes are transmitted across generations. Faced with the disconnection of traditional rituals caused by the younger generation's alienation, digital technologies such as the VR teaching and motion capture gene bank of Xiangxi Miao Drum Dance reconstruct the inheritance chain through the "digital twin+community exhibition" model, retaining the emotional warmth of oral transmission and transforming collective unconscious prototypes into scalable digital symbols. On the innovative level, Yang Liping uses traditional movements as the basis in "The Soul of the Peacock", reconstructs the expression of "divinity" through intelligent flipping movements and light narrative, and confirms the theory of "traditional contextualization" - that is, using modern choreography techniques to achieve contemporary translation of cultural meaning while maintaining core symbols (such as the logic of three curved limbs). This balance mechanism is also evident in the "trinity" art form of Xiangxi Miao drum, where the agricultural narrative maintains cultural authenticity through community festival ceremonies and performances, while relying on a targeted communication matrix to achieve adaptive transformation of cultural and tourism scenes. Research has pointed out that threshold control of cultural innovation is crucial, and it is necessary to maintain the bottom line of "ecological cultural resilience" in the evaluation of symbol deviation, and build a collaborative cultural ecosystem of "core layer buffer layer extension layer". The "three bends" movement system of Dai dance and the narrative structure of totem worship are typical manifestations of cultural sustainability. The resilience of its knees and the softness of its wrists are not only imitations of peacock form, but also symbolic expressions of reverence for nature. This action language is continued through oral transmission and physical memory in intergenerational transmission, while innovation is reflected in the integration of modern choreography techniques, such as the intelligent flip hand movement introduced by Yang Liping in "Soul of the Peacock". Cultural sustainability is manifested in the process of "re contextualization of tradition" - that is, endowing tradition with new vitality through technological, media, and aesthetic changes without destroying core symbols. The case of Miao Gu in Xiangxi, Hunan provides a horizontal comparison for this. The "trinity" art form of Miao drum (rhythm music, dance performance, logical narrative) is preserved through oral transmission and community festival activities in intergenerational inheritance. For example, the choreography of Miao Gu's actions such as "plowing the fields" and "transplanting rice seedlings" during harvest celebrations is not only a representation of historical memory, but also an adaptive expression of agricultural culture in contemporary times. This inheritance model is similar to the totemic narrative of Dai dance, reflecting the core concepts of "locality" and "ecological cultural resilience" in cultural sustainability. (New Society)