The invention discloses a preparation technology of a flexible butyronitrile double sided adhesive tape fire hose. NBR / PVC7030 is adopted as a main adhesive and molten with other ingredients by adopting changing temperatures, the flexible butyronitrile double sided adhesive tape fire hose is small in density, soft in touch, good in elasticity, high in strength, bright in surface, excellent in weather and aging resistance, fire retardant, capable of meeting the fire protection requirement, safe and reliable, and the flexible butyronitrile double sided adhesive tape fire hose has the extending and bending strength resisting quality, can bear tearing and rough force transmission, will not be damaged under the acute condition, an inner layer rubber pipe and an outer layer rubber pipe are subjected to high-temperature high-pressure press-fit with a reinforcing layer, tape turning is performed on time in the middle, the rubber pipes are subjected to a chemical reaction and physical absorption with the reinforcing layer through a white system, compact combination is achieved, the produced double sided adhesive tape is high in integrity, good in deflection resistance and long in service life, the water hose is flat, soft, low in weight, easy to unfold and fold and capable of effectively lowering labor intensity of users and improving the using comfort, and due to the covering layer is provided with corrugations, the fire hose is resistant to corrosion, capable of achieving heat preservation, good in corrosion resistance and long in service life.