Hydrolyzable temporary plugging agent and degradable drilling fluid

The invention provides a hydrolyzable temporary plugging agent and a degradable drilling fluid. The hydrolyzable temporary plugging agent comprises a blending material of high-molecular-weight polylactic acid and acid-soluble particles; wherein the high-molecular-weight polylactic acid is polylactic acid of which the molecular weight is greater than or equal to 15 million. The degradable drilling fluid is prepared from 1000 parts by weight of water, 30 to 50 parts by weight of soil, 5 to 10 parts by weight of alkali liquor, 20 to 50 parts by weight of polyether polyol, 10 to 20 parts by weight of high-molecular polymer, 30 to 50 parts by weight of nano emulsion, 2 to 6 parts by weight of propylene copolymer and the hydrolyzable temporary plugging agent. Wherein the high-molecular polymer can be, but not limited to, one or a combination of more than two of modified starch, modified cellulose, polyacrylonitrile, polyacrylamide, polyethylene glycol terephthalate, polyoxyethylene and polyethylene. 本发明提供了一种可水解暂堵剂及