Instant coffee freeze-drying pretreatment device and technological method thereof

The invention discloses an instant coffee freeze-drying pretreatment device and a technological method thereof. The instant coffee freeze-drying pretreatment device comprises a coffee extraction system, a coffee grinding system and a solid-liquid mixing grinder, and the coffee extraction system comprises a first pretreatment device, an extraction device and a liquid treatment device which are connected in sequence; the coffee grinding system comprises a second pretreatment device, a first-stage grinder and a second-stage grinder; and the liquid treatment device and the second-stage grinder are both connected to the solid-liquid mixing grinder, and the solid-liquid mixing grinder is provided with a first inlet communicated with the liquid treatment device and a second inlet communicated with the second-stage grinder. The above-mentioned technical scheme has the beneficial effects that: the flavor of coffee is guaranteed, the energy loss caused by thermal concentration is reduced, and the instant coffee has bet