The invention discloses an internal circulation oil-filled submersible motor with a double-layer shell, and relates to the technical field of submersible motors. The submersible motor specifically comprises a fully-enclosed outer shell and an inner shell coaxially fixed in the outer shell, wherein the inner shell is provided with a hole leading to an inner cavity of the outer shell, the front endand the rear end of the outer shell are respectively provided with a front end cover and a rear end cover, the front end cover is provided with a front thrust bearing, the rear end cover is provided with a rear thrust bearing, a motor rotating shaft is arranged between the front thrust bearing and the rear thrust bearing, the motor rotating shaft is arranged in the inner shell of the motor, one end of the motor rotating shaft penetrates through the front end cover, a rotor is fixed in the middle of the motor rotating shaft, a stator is arranged in the inner shell of the motor, the stator is arranged at the outer end of the rotor and corresponds to the rotor in position, and a heat dissipation module is arranged in the motor to drive hydraulic oil to circularly flow between the inner shelland the outer shell of the motor. By adopting the motor double-layer shell structure and the motor heat dissipation module, an additional power device does not need to be installed, the circulation flow of hydraulic oil in the motor is realized, and the heat dissipation capability of the motor is enhanced.