Degradable polymer temporary plugging agent and preparation method thereof

The invention discloses a degradable polymer temporary plugging agent and a preparation method thereof. The degradable polymer temporary plugging agent comprises first temporary plugging particles and second temporary plugging particles in a mass ratio of (55-75): (25-45). When the temporary plugging agent reaches a stratum plugging position for temporary plugging, the first temporary plugging particles are cross-linked to form a compact temporary plugging layer, the polyester elastomer in the second temporary plugging particle system has certain flexibility under the action of the compatilizer, and the polyester elastomer in the second temporary plugging particle system has certain flexibility under the combined action of the plasticizer and the lubricant. The second temporary plugging particles can resist high temperature under the action of an underground stratum, can be properly deformed and are locally crosslinked with the crosslinked first temporary plugging particles, so that the mechanical strength of