Adjustable box conveying mechanism and packaging stacker crane

The utility model provides an adjustable box conveying mechanism and a packaging stacker crane. The adjustable box conveying mechanism comprises a rack, a plurality of rotating rollers, a driving mechanism, a blocking component, a first linear air cylinder, a lifting plate and a translation piece. The multiple rotating rollers are arranged on the rack in parallel in the front-back direction, and each rotating roller is rotationally connected with the rack; the driving mechanism is connected with the rotating rollers; a gap is formed between every two adjacent rotating rollers; the blocking component is arranged on the rack; the first linear air cylinder is fixed to the lower side of the rack through a first support, the lifting plate is connected with the power output end of the first linear air cylinder, and the translation part is slidably connected to the upper side face of the lifting plate in the left-right direction and can jack one side of the bottom face of the box body upwards so that the box body ca