The present invention provides a novel method for deacidifying and repairing ancient books. Such treatment method comprises: first placing the ancient books to be treated in a closed deacidifying and repairing device; after sealing, performing dehumidification operation and vacuumizing operation on the system in sequence to maintain the system dry; and after the system is stable under negative pressure, turning on a fan set (4), directly delivering a nanoscale alkaline deacidifying powder to the deacidifying and repairing device via a gas pipe (15), or atomizing an alkaline deacidifying solution through a ultrasonic atomizer (14) and then delivering the atomized solution to the deacidifying and repairing device via the gas pipe (15), so that the ancient books to be treated absorb the alkaline deacidifying agent sufficiently and evenly; and meanwhile monitoring pH value and humidity of the ancient books, thereby implementing deacidification and repair of the ancient books.
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