The invention relates to an etching technology and provides a film covering method of metal strip for etching, an etching method and film covering equipment. The film covering method comprises steps of film covering, first die cutting, first demoulding, second film covering, second die cutting, third film covering, fourth film covering and second demoulding. The film covering equipment comprises a first film covering device, a first die cutting device, a first demoulding device, a second film covering device, a second die cutting device, a third film covering device, a fourth film covering device and a second demoulding device sequentially arranged and enabling metal strip to continuously move. According to the invention, the following steps are finished in sequence: the metal strip is coated with an adhesive film, the adhesive film on an etching area of the metal strip can be mechanically removed, a non-etching area is protected, and the etching area is in direct contact with etching liquid, so that labor force is saved, the processing cycle is shortened, proportion of a chemical reagent is reduced, requirements for the environment and the raw material are lowered, reliability of the non-etching area is improved, and the production efficiency is greatly improved.