The present invention provides a lansoprazole sustained-release preparation, which is characterized in that a sustained-release preparation prescription consists of a core prescription and a coating layer prescription. The core prescription consists of lansoprazole, lactose, hydroxypropyl methylcellulose, cross-povidone, powdered steatile, and magnesium stearate. The coating layer prescription isa mixture of two or more of ethyl cellulose, hydroxypropyl methylcellulose, polyacrylic resin, microcrystalline cellulose, and magnesium stearate. The preparation of lansoprazole sustained-release tablets by a compression coating method can better avoid the sudden release of the drug, and the prescription is simple, and separated addition of a pore forming agent and other sustained-release materials is not required. The invention provides the preparation method of lansoprazole sustained-release tablets with slow release in the intestine and high stability, is suitable for industrial production, and improves patient compliance, medication safety and bioavailability.