Fuente: WIPO "industrial hemp" The invention discloses an industrial hemp thermal insulation board and a preparation method thereof, belongs to the field of building materials, and particularly relates to a thermal insulation board and a preparation method thereof. The invention aims to solve the problem that an existing wall thermal insulation material is poor in flame retardance or toxic smoke is generated in a combustion process. The industrial hemp thermal insulation board comprises a formaldehyde removal layer, a heat preservation layer and a back adhesive layer. The formaldehyde removal layer is connected with the heat preservation layer face, and the heat preservation layer is provided with the back adhesive layer. The preparation method comprises the following steps of: 1, preparing an industrial hemp board; and 2, forming to obtain the industrial hemp thermal insulation board. The industrial hemp thermal insulation board has the advantages of good fireproof, heat-resistant, air-permeable and moisture-permeable functions, and a certain formaldehyde removal function. The method is mainly used for preparing the industrial hemp thermal insulation board.