In this paper，a kind of shaping transformation scheme of closure of automatic film wrapping machine for power capacitor manufacturing industry is introduced，and the specific transformation details，including such contents as overall transformation plan，design of the closure shaping mechanism，innovation of pneumatic control system，innovation of electronic control system，design of control program，installation and commissioning and application effect，are described in detail. The specific implementation parameters and program code are published also in this paper，a complete system transformation process is shown，facilitating technical exchanges，and inspiring more creative and beneficial optimization practices. It has been proved after the transformation that the transformation of the closure film shaping can make the automatic full film rolling machine automatically realize the shaping and bonding，which better solves the problems and difficulties of element rolling，improves the quality of the element and reduces the labor intensity.