The invention discloses a full-sea-depth magnetic coupling transmission motor and a full-sea-depth two-dimensional holder, wherein the motor comprises an outer magnetic rotor, an outer magnetic rotormounting shell, an inner magnetic rotor, an inner magnetic rotor mounting shaft, a pan-tilt motor, an isolation sleeve, a middle cylinder, a rear end cover and a watertight connector, the outer magnetic rotor is fixedly connected with the outer magnetic rotor mounting shell, and the outer magnetic rotor mounting shell is mounted on the outer side of the isolation sleeve through a bearing; the isolation sleeve, the middle cylinder, the rear end cover and the watertight connector form a closed cabin body, the pan-tilt motor is located in the closed cabin body, and the pan-tilt motor is installedon the middle cylinder body; the inner magnetic rotor is mounted on an inner magnetic rotor mounting shaft, the inner magnetic rotor mounting shaft is fixedly connected to a motor shaft of the pan-tilt motor, and the inner magnetic rotor mounting shaft extends into a bearing in a cavity in the inner side of the isolation sleeve; the pan-tilt motor drives the inner magnetic rotor to rotate, so that the outer magnetic rotor and the outer magnetic rotor mounting shell are driven to rotate through coupling. The invention has the advantages of long working time, low power consumption, low noise, low cost, light weight and high response speed.