The invention discloses a self-resistance heating stamping forming method for a difficult-to-deform metal panel. As a metal material has resistance, very high current is introduced to the panel to heat a workpiece, and hot stamping is carried on the metal panel. In specific, after tight contact of a stamping metal panel and a copper bar electrode plate by means of a clamp or a mold, a high-frequency switch heating power supply is started to provide current. The current is led to a position of a worktable of a press through the copper bar electrode plate for a self-resistance heating stamping forming process. The method disclosed by the invention can solve the problem that difficult-to-deform metal panels such as titanium alloy, magnesium alloy and high strength steel are difficult to formby means of a conventional cold stamping process, and stamping processes such as bending, stretching and expanding of the metal panels are achieved. Compared with an existing hot stamping forming technology, the production cost can be lowered remarkably, so that miniaturization of a hot stamping part is achieved, and the application field of a difficult-to-deform metal stamping part is expanded.