A three-degree-of-freedom adjustable cabin closing device comprises a bottom arm device, a front arm device, a left arm device, a right arm device and a rear arm device. The bottom arm equipment comprises two transfer trolleys, a connecting frame arranged between the two transfer trolleys and a transfer track, the two transfer trolleys are installed on the transfer track, and the connecting frame is connected with the two transfer trolleys through quick connectors; the front arm device comprises a bottom frame, a sliding frame, a vertical frame and a
workbench. The bottom frame is fixedly arranged at the end, without the transfer track, of the bottom arm device. The left arm device comprises a side wall bottom frame, a side wall inner support and a side wall
workbench. The right arm equipment and the left arm equipment are consistent in structure; the rear arm device comprises a rear wall bottom frame, a rear wall middle frame, a left
workbench, a right workbench, a linear bearing
assembly A and a linear bearing
assembly B. According to the utility model, the positioning mode of the cabin prefabricated slab is changed into an
operation mode of a mechanical arm form from manual hoisting, and the hoisting tool does not need to be loaded and unloaded repeatedly, so that the safety of operators can be effectively protected, and the cabin wall is prevented from being damaged.