The invention discloses a removable film-loading platform with magnetic force. The removable film-loading platform is characterized by comprising a square support which is composed of a left bracket, a right bracket and a rear bracket, as well as a film-loading plate, wherein one end of the square support is provided with an opening; the left and right brackets are provided with guide rails, and the rear bracket is provided with positioning magnets; a position, which corresponds to the guide rails of the left and right brackets, of the film-loading plate is provided with a sliding block, the two corresponding sides or periphery of the film-loading plate are/is provided with film-pressing magnets, film-pressing strips are absorbed on the film-pressing magnets in a magnetic manner, and the top, which corresponds to the positioning magnets, of the film-loading plate is provided with a positioning absorbing block. The film-loading platform provided by the invention has the advantages that the film-loading plate can realize change and movement, the sample application operation is convenient, the film-loading platform is convenient to load and take a film, the running water detection is possible, and a cross infection is not generated.