Explosion and supercritical carbon dioxide fluid combined degumming method for apocynum venetum

The invention relates to an explosion and supercritical carbon dioxide fluid combined degumming method for apocynum venetum, aiming at the problems of severe environment pollution and large fiber damage in a present degumming process of apocynum venetum, and the problems of uneasy control of quality and non-ideal degumming effect in a single degumming method. The method comprises the steps of firstly pre-treating apocynum venetum with explosion under a relatively low temperature and pressure so as to prevent the fiber damage and remove most of colloid structure change; then extracting residual colloid in apocynum venetum by using the supercritical carbon dioxide fluid; and at the same time, degrading partial of lignin in the fibers by using a laccase solution. The method has the characteristics of high degumming efficiency, soft fiber handfeel, good product quality of degummed ramie, and energy conservation and environment protection. Besides, no chemicals are used in the method.