Patents are a kind of legal protection for inventions. By applying for a patent, you can obtain the exclusive right to the invention and prevent others from using, manufacturing or selling the invention without permission within a certain period of time. For a new drinking water magnetizing device, it is novel, creative and practical, that is, it is obviously different from the existing technology, has technological progress, and can play a practical role in practical application, which meets the requirements of patent application. When applying for a patent, it is necessary to describe the structure, principle and function of the device in detail, and submit application documents, including patent application, specification, claims and drawings.