利用土壤埋藏、海水降解、活性污泥及高等真菌降解实验对化学法合成的聚３－羟基丁酸酯（ＰＨＢ）薄膜进行了生物降解性研究．结果表明，降解ＰＨＢ薄膜的微生物分布比较广泛；水解作用和酸解作用在ＰＨＢ生物降解过程中对其失重率影响很小（３．５％以下）；液态摇动培养不利于木素降解菌云芝５．４８对ＰＨＢ薄膜的降解（培养至第２０ｄ，ＰＨＢ１２和ＰＨＢ２７仅降解１７．８％和１３．５％）；ＰＨＢ薄膜的结晶度比分子量对其生物降解性影响更大，结晶度增加则生物降解性降低 The biodegradability of poly (3-hydroxybutyrate) (PHB) films synthesized by chemical methods was studied by soil burial, seawater degradation, activated sludge and high fungi degradation experiments. The results showed that the biodegradation of PHB film was relatively widespread. Hydrolysis and acidolysis had little effect on the rate of weight loss (3.5%) during PHB biodegradation. Liquid rocking culture was not good for lignin-degrading bacterium 5.48 PHB film degradation (cultured to the first 20d, PHB12 and PHB27 degradation of only 17.8% and 13.5%); PHB film than the molecular weight of its biodegradability greater impact, the degree of crystallinity increases Biodegradability decreases