Multi-component acid pressure temporary plugging additive and preparation method thereof

The invention relates to a multi-component acid pressure temporary plugging additive and a preparation method of the temporary plugging additive. The temporary plugging additive comprises the following raw materials in percentages by weight: 30-43% of starch graft copolymer, 25-35% of acrylic acid-acrylamide crosslinking copolymer, 5-16% of fibrous polyester enhancer, and 6-25% of auxiliary. The temporary plugging additive provided by the invention comprises a plurality of polymer components, simultaneously has high acid solubility, high temporary plugging rate and high temperature resistance by means of combined functions of these components, can achieve in-time acid solution on the premise of ensuring the plugging rate and the strength, and can fully meet the requirements on the efficiency and the performance in the later development of a low permeability oil well; the temporary plugging additive can be applied to plugging cracks with different widths by regulating the contents of the components and therefo