Instant lotus seed and preparation method thereof

The invention discloses an instant lotus seed and a preparation method thereof. The method for preparing the instant lotus seed comprises the following steps: after the kernel-removed lotus seed is subjected to curing treatment, the instant lotus seed can be obtained through freezing and drying. The step of freezing and drying is carried out according to the following three stages: a first stage is quick freezing, which is to cool the lotus seed at a speed of between 1 and 5 DEG C/min to a temperature of between 18 and 40 DEG C below zero, and maintaining the temperature for 6 to 15 hours; a second stage is sublimation drying, which is to heat the lotus seed from the freezing temperature to a temperature of between 65 and 110 DEG C at a speed of between 2 and 8 DEG C/min, and maintaining the temperature for 6 to 10 hours at pressure of between 110 and 130Pa; and a third stage is resolution drying, which is to cool the lotus seed from the sublimation drying temperature to a temperature of between 45 and 50 DEG C at a speed of between 0.1 and 5 DEG C/min for 3 to 8 hours at pressure of between 30 and 50Pa. The instant lotus seed solves dryness and astringency, oxidation and other problems, not only maintains the flavor of the fresh lotus seed, but also improves the nutrient value of the lotus seed.