Concrete prefabricated box girder hoisting method and hoisting device

The invention discloses a concrete prefabricated box girder hoisting method and hoisting device, and relates to the field of concrete prefabricated box girder hoisting, the hoisting device comprises two sets of hoisting devices, each set of hoisting device comprises a cross beam, two connecting rods and a balance beam, one ends of the two connecting rods are installed on the two sides of the cross beam through first fixing mechanisms, and the other ends of the two connecting rods are installed on the balance beam through second fixing mechanisms; one end of the connecting rod is arranged on the balance beam, the other end of the connecting rod is arranged on the two sides of the balance beam through a second fixing mechanism, a prefabricated box is placed on the cross beam, a mounting hole is formed in the cross beam, and the connecting rod penetrates through the mounting hole to limit the position of the prefabricated box placed on the cross beam; the two connecting rods can move freely in the length directi