The invention discloses a water-storage water heater with electricity-protection wall technique, which comprises a shell, an inner frame, an insulating inlet water pipe and an insulating outlet water pipe. The shell is provided thereon with a water inlet and a water outlet. The insulating inlet/outlet water pipes are provided inside with an insulating mechanism which allows the length of inlet/outlet water paths inside the pipes to be larger than the actual length of the insulating inlet/outlet water pipes, a screw-like spiral bar in a spiral conveyor is arranged inside each of the insulating inlet water pipe and the insulating outlet water pipe, so as to form a spiral through water path inside the pipe, or a twisted bar twisted from a plastic sheet is used to replace the screw-like spiral bar. The insulation mechanism tallies with the inner holes of the pipes in shape, the water paths inside the pips twist and circulate along the twisted plane of the insulation mechanism and is fixed inside the insulating inlet/outlet water pipes via screws, and the insulating inlet/outlet water pipes, the inner frame and the shell are fixed each other via improved screws. The invention has the advantages of no need of being installed by a user, good hidden effect, no increase in occupied space, and good electricity-protection effect; and solves the problems of inconvenient use and potential electric shock caused by the improper installation when the user installs the water heater by himself.