Preparation method of black plaster matrix

The invention relates to a preparation method of a black plaster matrix. The method aims to solve the problems that black plaster matrixes contain toxic substances and cause environmental pollution. The preparation method of the black plaster matrix mainly comprises the preparation of a porous 3D micro-nano fiber structure and the combination of the porous 3D micro-nano fiber structure and an oil-soluble matrix with the glass transition temperature of 30-45 DEG C. Compared with a traditional black plaster matrix, the modern black plaster matrix prepared by means of the method has the advantages that the volume and the mass are correspondingly reduced, skin irritation is avoided, and the compliance of patients is improved. The preparation method avoids high-temperature oil pressing in a traditional process and application of toxic red lead to form a fiber structure; the whole process adopts an advanced modern technology, environmentally friendly and non-toxic materials are applied, andthe process flow is short