The invention discloses a novel adjustable valve bag punching device. The novel adjustable valve bag punching device comprises a pair of supports and a bottom supporting rod. A plurality of annular grooves are formed in the bottom supporting rod in the axial direction. A control rotary shaft is arranged at the bottoms of the supports and is located over the bottom supporting rod. The control rotary shaft is rotatably connected with the supports and is connected with a punching rotary shaft through a connecting plate. A needle holder is fixed outside the punching rotary shaft. Punching needlesare fixed to the needle holder. One end of the control rotary shaft stretches out of the supports, and a driving handle is fixed to the end, stretching out of the supports, of the control rotary shaft. A supporting block is fixed to the inner side of one support. An adjustment bolt is arranged on the supporting block. The novel adjustable valve bag punching device can be directly mounted on valvebag production equipment so that a valve bag production process can be simplified, and the production cost can be reduced; punching needles with different sizes can be used by replacing the needle holder; and meanwhile, the size of punched holes can be fine adjusted through the adjustment bolt, so that the size precision of the punched holes is greatly improved.