The invention discloses a novel bent steel sheet processing method. A drawing of a bent steel sheet is made into a plane drawing, the plane drawing of the bent steel sheet is flatly unfolded, a manufactured planar steel sheet is firstly attached to a whole FPC by a machine, and then pressed on the FPC by using a pressing machine; a stamping die is prepared, and the stamping die is used for carrying out local stamping and bending on the steel sheet attached to the FPC; and in the stamping and bending process, a partial structure of the die needs to be in contact with the FPC, the FPC is tightlypressed, and then the steel sheet part needing to be bent is extruded downwards by utilizing a punch above of the pressed die part, so that the effect of bending is achieved. According to the method,the problems that the low efficiency and poor quality consistency caused by manual pressing with hands sheet-by-sheet, the high rejection rate caused by fitting deviation of the steel sheet, and reduction of the service life of the pressing machine are solved.