A multi-axial wave energy conversion device comprising: a main body; and at least one permanent magnet generating assembly disposed on the main body, the at least one permanent magnet generating assembly comprising at least one permanent magnet generator, an arm and a driving component, the at least one permanent magnet generator comprising a stator structure and a rotor structure capable of rotating or swinging relative to the stator structure, the at least one permanent magnet generator being disposed or coupled between the main body and the arm or between the arm and the driving component, and the rotor structure being driven to rotate or swing relative to the stator structure when the arm moves relative to the main body or the driving component moves relative to the arm; wherein the at least one permanent magnet generator comprises a third permanent magnet generator, a first end of the arm is coupled to the main body, a second end of the arm is coupled to the third permanent magnet generator, the third permanent magnet generator comprises a third stator structure and a third rotor structure, the driving component is directly connected to the third rotor structure, the first end of the arm is capable of rotating or swinging relative to the main body around a first axis (A1'), the second end of the arm is capable of rotating or swinging relative to the driving component around a second axis (A2') parallel to the first axis (A1') and a third axis (A3') different from the first axis (A1') and the second axis (A2'); wherein the first end of the arm is connected to the main body in a swinging manner or a rotating manner around the first axis (A1'), the second end of the arm is connected to a third shell of the third stator structure of the third permanent magnet generator in a swinging manner or a rotating manner around the third axis (A3'), a third rotor body of the third rotor structure is disposed inside a third stator body of the third stator structure in a swinging manner or a rotating manner around the second axis (A2'), the at least one permanent magnet generating assembly further comprises at least one hydraulic power generation device disposed between the arm and the main body and/or between the arm and the third permanent magnet generator. a main body; and at least one permanent magnet generating assembly disposed on the main body, the at least one permanent magnet generating assembly comprising at least one permanent magnet generator, an arm and a driving component, the at least one permanent magnet generator comprising a stator structure and a rotor structure capable of rotating or swinging relative to the stator structure, the at least one permanent magnet generator being disposed or coupled between the main body and the arm or between the arm and the driving component, and the rotor structure being driven to rotate or swing relative to the stator structure when the arm moves relative to the main body or the driving component moves relative to the arm; wherein the at least one permanent magnet generator comprises a third permanent magnet generator, a first end of the arm is coupled to the main body, a second end of the arm is coupled to the third permanent magnet generator, the third permanent magnet generator comprises a third stator structure and a third rotor structure, the driving component is directly connected to the third rotor structure, the first end of the arm is capable of rotating or swinging relative to the main body around a first axis (A1'), the second end of the arm is capable of rotating or swinging relative to the driving component around a second axis (A2') parallel to the first axis (A1') and a third axis (A3') different from the first axis (A1') and the second axis (A2'); wherein the first end of the arm is connected to the main body in a swinging manner or a rotating manner around the first axis (A1'), the second end of the arm is connected to a third shell of the third stator structure of the third permanent magnet generator in a swinging manner or a rotating manner around the third axis (A3'), a third rotor body of the third rotor structure is disposed inside a third stator body of the third stator structure in a swinging manner or a rotating manner around the second axis (A2'), the at least one permanent magnet generating assembly further comprises at least one hydraulic power generation device disposed between the arm and the main body and/or between the arm and the third permanent magnet generator.