The utility model discloses an orbital transfer device with a self-locking mechanism. The orbital transfer device comprises a linear motor, a feeding push rod, a fixing bracket, a moving bracket, a linear track, an arc track, a linear turnoff, an arc turnoff, a trunk, guide tracks, expansion bolts, upper C-shaped slideways, lower T-shaped sliding blocks and the self-locking mechanism, wherein the linear motor is fixed on the fixing bracket; the output shaft of the linear motor is in key joint with the feeding push rod and is used for applying the moment in the straight line direction to the feeding push rod; the feeding push rod is connected with the moving bracket through a hinge pin; two guide tracks are distributed on the left and right sides of the linear motor; each guide track is divided into two parts, namely, the upper C-shaped slideway and the lower T-shaped sliding block; the lower T-shaped sliding block which moves in the axial direction is mounted inside the upper C-shaped slideway. By controlling the linear motor, the feeding push rod is in a stretching or shrinking state, then the two tracks are opened or closed, orbital transfer is achieved, and the orbital transfer device is applicable to places with small spaces and orbital transfer requirements such as nuclear power plants and repairing machine rooms.