The invention relates to a returning device for a ship compartment. The returning device is characterized by comprising an outer compartment outer wall (1), a spherical outer compartment inner wall (2), and a spherical inner compartment outer wall (3), wherein the spherical inner compartment outer wall (3) is separated from the spherical outer compartment inner wall (2) through positioned support balls (6); a weight (4) is arranged at the bottom of the inner compartment, and support columns (10) uniformly arranged are arranged between the outer compartment outer wall (1) and the outer compartment inner wall (2); a pair of the support columns positioned on the same straight line are provided with outer compartment magnetic poles (8), and inner compartment magnetic poles (7) are arranged on the inner compartment inner wall corresponding to the outer compartment magnetic poles (8); magnetic pole switches (9) are respectively arranged on the outer compartment outer wall (1) and the inner compartment inner wall. When people need to pass in and out the compartment door, the magnetic pole switches (9) are switched on, the outer compartment magnetic poles (8) and the inner compartment magnetic poles (7) mutually attract, so that an inner compartment door and an outer compartment door are aligned and relatively static.