Composite temporary plugging agent for fracturing and preparation method of composite temporary plugging agent for fracturing

The invention provides a composite temporary plugging agent for fracturing and a preparation method of the composite temporary plugging agent for fracturing. The composite temporary plugging agent isprepared from, on the basis of the total mass of the composite temporary plugging agent, 5-90% of polyglycolic acid, 0.1-3% of a non-crosslinking fracturing fluid thickening agent, 0.1-5% of an oxidant, 0.01-2% of an activating agent, 0.2-3% of inorganic base and the balance solvent. Polyglycolic acid has a great plugging performance and a complete and thorough degradation property and can be decomposed into carbon dioxide and water, and under the condition that a reservoir temperature is in a range of 30-240 DEG C, self-degradation of polyglycolic acid can be realized, and polyglycolic acid is also available for synergistic degradation with a gel breaker, so that artificially-controllable complete degradation can be realized, reservoir damages can be reduced, and reservoir production capacity is increased to the