The invention relates to a production method of a halogen-free flame-retardant silicone rubber cable sleeve, and belongs to the technical field of functional rubber. The production method of the halogen-free flame-retardant silicone rubber cable sleeve is provided against the problems of large addition amount of metal hydroxide, poor compatibility and unsatisfactory physical properties of f halogen-free flame-retardant silicone rubber cable sleeves. In the invention, cetyltrimethylammonium bromide modified iron-based montmorillonite is adopted as the filler of the rubber in order to improve the thermal stability and the mechanical performances of the rubber, the surface of aluminum hydroxide is grafted and modified with hexamethyldisilazane to reduce the surface polarity of aluminum hydroxide, improve the compatibility of aluminum hydroxide and silicone rubber and passivate the surface of aluminum hydroxide in order to solve the problems of easy aggregation and difficult dispersion, the modified iron-based montmorillonite, the modified aluminum hydroxide and polypropylene resin are internally mixed to prepare a halogen-free flame retardant, the halogen-free flame retardant is added to the silicone rubber, and the silicone rubber is vulcanized and is processed in a welding machine to form a sleeve which is the halogen-free flame-retardant silicone rubber cable sleeve.