The invention relates to a basting and bag opening integrated automatic template device which comprises a basting template and a bag opening template. The basting template is composed of a basting bottom layer plate and a basting surface layer plate. A slot the same as a cut piece in contour is excavated in the basting surface layer plate, a basting slot position is arranged along the edge of the slot, the bag opening template is composed of a bag opening bottom layer plate and a bag opening surface layer plate, the bag opening template is provided with a bag opening stitching slot position, the cut piece is fixed between the basting bottom layer plate and the basting surface layer plate, a sewing machine syringe needle is subjected to transverse and vertical basting along the basting slot position, and then hidden yarn is stitched along the bag opening stitching slot position. Basting and bag opening can be completed at a time, complex work procedures are simplified and standardized, the cell-to-strip operation is omitted, the requirement for the technological level for a sewing worker is lowered, and one-button operation is achieved.