Abstract: Currently, the practical application of powder-based catalytic materials is limited by challenges such as difficult recovery, high post-treatment costs, and the potential for secondary pollution. Additionally, reports on green, environmentally friendly, high-performance catalytic materials remain relatively scarce. Therefore, this study presents the synthesis of a wood-based bimetallic oxysulfide catalytic material via a hydrothermal method, which is not only easy to recover but also cost-effective. A comprehensive evaluation of its performance was conducted using various analytical techniques. The results demonstrate that the catalyst exhibits excellent catalytic performance in the reduction of organic dyes. Specifically, the CuMgOS/natural Zenia insignis Chun-based and CuMgOS/natural Pinus sylvestris var. mongholica Litv.-based composite catalysts completely reduced MB in 30 and 48 min, respectively, and fully reduced RhB in 22 and 40 min. The CuMgOS/delignification of Zenia insignis Chun-based and CuMgOS//delignification of Pinus sylvestris var. mongholica Litv.-based composite catalysts fully reduced MB in 16 and 22 min, respectively, and completely reduced RhB in 16 and 24 min. Lignin removal treatment enhanced the catalytic reduction performance of the materials. After multiple reuse cycles, the catalytic efficiency remained above 85%, showing excellent reusability and structural stability. Its simple synthesis method suitable for large-scale production, providing new insights into the design of green, high-performance catalytic materials, and expanding the potential applications of wood in functionalization and high-value applications.