Thick fireproof coating construction device and construction method thereof

The invention relates to a thick fireproof coating construction device and a construction method thereof. The construction device comprises an integral coating template, wherein the integral coating template is of a cylinder structure capable of being circumferentially unfolded with two end openings, the shape of the cylinder structure is matched with the appearance structure of a preformed coating on the outer side of a steel structure; a plurality of material openings are arranged on an integral coating formwork at intervals in the length direction; valves are arranged in the openings, the integral coating formwork is provided with baffles at both ends and sealing strips that can match with gaskets at the ends of the fireproof coating. According to the invention, the fireproof coating onthe outer side of the steel structure is constructed and integrally formed by injecting the fireproof coating into the integral coating formwork, integral forming is achieved, so that the problems that thick fireproof coatin