The present disclosure discloses a high-temperature aerogel heat insulation coating, preparation equipment and a use method for the preparation equipmen. A supporting leg frame is arranged on the outer side wall of the reaction tank; a storage cavity is formed in the upper outer box; a dispersing shaft is arranged in the storage cavity; dispersing blades are installed on the dispersing shaft; a dispersing motor and a material guiding pipe are arranged outside the upper outer box; an unloading mechanism is arranged under the reaction tank; and an exhaust hole and a feeding hole are formed in the outer part of the reaction tank.