【Objective】A strain with the ability of lignin degradation was screened from landscaping waste compost.【Method】The obtained isolates were identified by molecular identification; the lignin degradation isolates were inoculated into sterilized Ficus microcarpa var. pusillifolia wattle to study the degradation ability, including analyses of the content of lignin, cellulose and hemicellulose of the wattle respectively.【Result and conclusion】The results showed that the lignin degradation isolates were identified as Streptomyces sp. Compared with non-inoculated treatments, samples inoculated with different dosages (5%, 10%, 15%) of the bacteria fermentation liquid into Ficus microcarpa broken branches, respectively, the lignin content could be reduced by 22.48%, hemicellulose content could be reduced by 26.60% after 45 d incubation.