<p>Composting remains the predominant method for treating green waste (GW). Among the various wavelengths of light, no-UVA has been found to offer distinct advantages in enhancing the degradation of lignocellulose. To achieve a more stable enhancement of lignocellulose degradation in GW composting, this study implemented a photodegradation in composting by combination of various proportions of Chinese medicinal herbal residues (CMHRs) (15%, 20%, 25%) and bone char (BC) (15%, 20%, 25%). Composting in this study was conducted under condition without UVA exposure. CMHRs and BC addition yielded notable positive effects, with the most favorable combination being 20% CMHRs and 20% BC. Under the best treatment, peak temperature, lignin degradation, NO₃⁻–N, and humification coefficient exhibited significant enhancements, increasing by 16%, 16%, 124%, and 24%, respectively, compared to the control (without additive), resulting in production of high-quality compost in only 30&#xa0;days. Furthermore, compost product treated under optimal condition closely matched the ideal range for bulk weight, water-holding capacity, total porosity, particle-size distribution, and coarseness index. The product also exhibited the highest root length, seed germination rate, and germination index in phytotoxicity test. Correlation analysis and multivariate analysis of variance indicated that CMHRs and BC accelerated lignin degradation by enhancing organic matter degradation and enhancing nitrification.</p>