In the context of a VUCA （volatility， uncertainty， complexity， ambiguity） environment， how sharing platforms effectively respond to uncertainties， adapt to changes， and maintain vitality is critically important for the high-quality development of China’s digital economy. Nevertheless， existing literature lacks a systematic exploration of the reactive actions and resilience of sharing platforms under VUCA conditions. Drawing on a complex systems perspective， it focused on representative domestic sharing platforms and employed exploratory case studies alongside fuzzy-set qualitative comparative analysis （fsQCA） to investigate the key types of actions driving platform reactive resilience and their coupling patterns under VUCA conditions. The findings reveal that： fulfilling social responsibilities， empowering platform providers， adjusting business models， and optimizing products and services are significant antecedent conditions for achieving reactive resilience， yet none constitute necessary conditions for its formation； three distinct coupling configurations of platform actions emerge with high reactive resilience： the “innovation with integrity under abundant resources” pattern suited for large-scale platform enterprises， the “responsible stewardship under resource constraints” pattern for non-large-scale platforms， and the “multi-action coupling responsible stewardship” configuration that transcends platform scale—collectively embodying a multi-path driving mechanism for sharing platform reactive resilience. The conclusions not only contribute a novel theoretical lens to organizational resilience under a VUCA environment， but also offer valuable practical insights for advancing the high-quality development of China’s digital economy.