Instant oil tea and preparation method thereof

The preparation method comprises the following steps: preparing a camellia oleifera soup base from raw materials consisting of crude tea leaves, seasonings and water, and then pre-cooling the treated camellia oleifera soup base in a quick-freezing warehouse at the temperature of-25 DEG C or below for 4-6 hours, so that the center temperature of the camellia oleifera soup base reaches-21 DEG C or below; the method comprises the following steps: pre-freezing oil tea soup, pushing the pre-frozen oil tea soup into a drying bin, vacuumizing, starting gradient heating and drying when the vacuum degree of the drying bin reaches 45-55Pa within 25-35min, cooling the oil tea soup to normal temperature, and carrying out vacuum packaging and sealing with a packaging bag. The camellia oleifera soup base is pre-cooled and then is subjected to vacuum gradient type heating and drying in the drying bin, so that different food materials in the camellia oleifera soup base can keep respective delicious taste and restore original