Abstract: The present application relates to an adjusting device, a packaging apparatus, and an adjusting method. In the adjusting device, a first adjuster may provide a first adjustment for a structure to be adjusted such that all the structures to be adjusted are disposed at equal intervals along theoretical spacings in a first direction (a), and a second adjuster may adjust a spacing between the structure to be adjusted and a structure to be adjusted adjacent thereto such that the structures to be adjusted may be disposed in alignment with corresponding receptacles, facilitating precise placement of each structure to be adjusted in the corresponding receptacle.