The invention discloses a full-sealed water, fire and explosion prevention cable joint safety box, comprising a shell made of a weak magnetic iron plate synthesis material. The shell is a cylinder molded from two semi cylindrical shells integrally once without
welding, the two semi cylindrical shells of the shell are connected through a stock
set screw at the explosion-proof inner hexagonal concave end, the diameters of both ends of the shell are reduced to form contraction openings, a section of cylinder with a small size is formed at each contraction opening, a waterproof sealing accessory made of a high-quality
silicone rubber material is installed in each contraction opening, a fireproof
flame-retardant insulating layer is adhered to the inner wall of the shell, and an anticorrosion and anti-
ultraviolet powder is sprayed on the outer surface of the shell. The invention has the advantages that the shell is molded integrally without
welding, is integrally treated by hot galvanizing and
degaussing, is integrally sprayed with the anticorrosion and anti-
ultraviolet material, and has the advantages of strong explosion-proof force, strong
corrosion resistance and long
aging resistance time. The traditional shell has common tensility and poorer explosion-proof force and is smelted to be in a
carbonization state or seriously deforms for burning for a long time, and the fireproof
flame-retardant insulating layer can fulfill the functions of
fire prevention,
flame retardancy and heat insulation.