The invention discloses a processing technology of a titanium alloy faucet shell. The processing technology of the titanium alloy faucet shell comprises the following steps of preparing a blank, machining an outer surface of the blank, packing compact, namely a first butt joint surface of a first shell blank is connected and a second butt joint surface of a second shell blank is combined and arranged in the die, the die is arranged in a vacuum bag in a sleeved mode, and the die sleeved in the vacuum bag is arranged in a super-plastic forming device; carrying out diffusion connection, namely vacuumizing, the vacuum degree is 10<-2>-10<-5> Pa, then heating to 870-940 DEG C within 5-9 hours, pressurizing to 1-2 Mpa and maintaining the pressure for 2-4 hours, so that the first butt joint surface and the second butt joint surface are in diffusion connection to form a faucet shell, the air pressure is unloaded, and the faucet shell is cooled to the room temperature along with a furnace; machining and polishing. According to the processing technology of the titanium alloy faucet shell, the problem that a special-shaped cavity of the faucet cannot be machined by adopting a conventional machining method is solved by adopting the titanium alloy diffusion connecting process, and the processing technology has the characteristics of being high in forming size precision, high in integrality,short in machining period and high in material utilization rate.