The utility model relates to a flour secondary packaging production line in bags, including inner wrapping operation assist drive device, quadruplex position filling equipment and automatic seam package equipment, inner wrapping operation assist drive device's input is used for the input to be equipped with the small bag package of flour, installs the input of quadruplex position filling equipment at inner wrapping operation assist drive device's output, and automatic seam package equipment is connected to the output of this quadruplex position filling equipment. The utility model discloses an use can be packed the small bag package encapsulation automatically for big bag, degree of automation is high, and package standard is unified moreover, and the packaging quality is good, and effectively boost efficiency can reduce enterprise's recruitment 50% through testing this package system of adoption to obviously reduce workman intensity of labour.