The invention discloses a preparation method of a fire hose. The preparation method comprises steps as follows: a, a lining cylinder is prepared firstly; b, a braided layer covering the lining cylinder is formed by asbestos ropes, nylon ropes and steel wires through three-dimensional weaving; c, the prepared lining cylinder is sleeved with the braided layer and is coated with an adhesive, so that the braided layer is fixed on the surface of the lining cylinder; d, a corrosion-resistant, wear-resistant and high-temperature-resistant coating layer adheres to the surface of the braided layer by the aid of an adhesive. With the adoption of the preparation method of the fire hose, a vulcanized rubber-like material is not required, the fire hose has the characteristics similar to those of fire hoses provided with rubber linings; however, the method has the advantages in the manufacturing technology.