The invention discloses a multifunctional electrostatic paint spray gun. The multifunctional electrostatic paint spray gun comprises a handle, a charging interface, a storage battery, a switch knob, a gun body, a paint can, a connecting pipe and a spray head. The front end of the gun body is connected with a spray pipe, and a flow regulating valve is movably connected to the front end of the spray pipe. The spray head is arranged on the spray pipe, and an annular cover is arranged at the outer end of the spray head. A lamp strip is arranged on the spray head and electrically connected with the storage battery. The upper portion of the spray pipe is connected with the connecting pipe, and the connecting pipe is connected with the paint can in a threaded mode. According to the multifunctional electrostatic paint spray gun, the annular cover is arranged at the outer end of the spray head, so that paint splashing is prevented when the paint spray gun sprays paint; the lamp strip is arranged on the spray head, and thus people can better observe the flatness of the paint spray surface during paint spraying; the spray head of the paint spray gun is provided with the flow regulating valve, and the paint spray magnitude can be regulated as needed in the paint spray process; and the multifunctional electrostatic paint spray gun is high in practicability and easy to use and popularize.