Religion can shape sustainable consumption not only through general moral values but also through sacred obligations. This qualitative study examines how Islamic religiosity informs pro-environmental consumption among Chinese Muslims and how this relationship extends the Value-Belief-Norm (VBN) framework. Drawing on semi-structured interviews with 49 practicing Muslims across selected Chinese cities, the study identifies three interrelated themes: Halal Products, Religious Obligation, and Social Responsibility. The findings demonstrate that participants often interpret environmentally responsible consumption through Islamic ideas of purity, stewardship, non-harm, moderation, and justice. These religious values shape environmental beliefs about responsibility and activate personal norms that frame sustainable consumption as a moral and religious duty rather than merely a discretionary consumer choice. The study contributes by conceptualizing Islamic religiosity as a boundary condition that gives sacred meaning and moral accountability to the VBN pathway in a minority, non-Islamic context. It also offers implications for faith-sensitive sustainability policy, halal-green certification, ethical marketing, and community-based environmental education.