The invention relates to a super capacitor pole piece production piece tailoring device with a union structure. The super capacitor pole piece production piece tailoring device comprises a piece tailoring device body and rubber wrapping pads. A servo motor is arranged in the piece tailoring device body, the outer side of the servo motor is connected with a connecting rod, a gravity ball is arranged at the lower end of the connecting rod, a punching plate is arranged at the lower end of the gravity ball, the rubber wrapping pads are arranged at the left end and the right end of the gravity ball, and punching blocks are fixed to the upper ends of the rubber wrapping pads. Hydraulic rods are connected to the upper ends of the punching blocks, and hydraulic pumps are arranged at the upper endsof the hydraulic rods. According to the super capacitor pole piece production piece tailoring device with the union structure, the servo motor can drive the connecting rod to rotate left and right, the connecting rod drives the gravity ball to slide left and right at the upper end of the punching plate, the gravity ball applies gravity pressure to the punching plate, the punching plate swings left and right through a rotation shaft, and the punching plate and clamping blocks are integrally formed through injection molding.