The invention provides a device and a method for continuous galvanizing of a profile and a pipe, and belongs to the technical field of galvanizing of the profiles and the pipes. The device consists of a reducing furnace, a galvanized part transmission device, a hot galvanizing zinc pot, a transmission device in the zinc pot, a protective gas supply device and a control system. By the use of the device, galvanizing assistant fluid is not needed to be coated on the surface of a galvanized part, so that formation of zinc soil due to retention of the galvanizing assistant fluid on zinc liquid is avoided; due to the efficient reducing furnace and the transmission device in the zinc pot, the production time can be greatly shortened; and protective gas in the zinc pot further reduces oxidized slag of the high-temperature zinc liquid, so that the production cost is effectively reduced.