The present application belongs to the field of engine low vortex rotors, and particularly relates to a device for low-pressure turbine belt stator balance. The device for the low-pressure turbine belt stator balance comprises a rotating spindle assembly, a casing front supporting assembly and a casing rear supporting assembly. The rotating spindle assembly comprises a rotating spindle body, a connecting part is arranged at the central portion of the rotating spindle body, the connecting part is fixedly connected to a low-pressure turbine rotor, and the connecting part of the rotating spindlebody is integrally formed with the rotating spindle body. According to the device for the low-pressure turbine belt stator balance, the connecting part of the rotating spindle body is connected with the low-pressure turbine rotor by bolts; the casing front supporting assembly comprises a front supporting frame, one end of the front supporting frame is rotatably connected to the front end of the rotating spindle body, and the other end of the front supporting frame is fixedly connected with the front end of a low-pressure turbine rotor stator; the casing rear support assembly comprises a rear supporting frame, one end of the rear supporting frame is rotatably connected to the rear end of the rotating spindle body, and the other end of the rear supporting frame is fixed to the rear end of the low-pressure turbine rotor stator. The device for the low-pressure turbine belt stator balance is capable of providing support for the low-pressure turbine rotor to ensure that no rubbing occurs between the rotor and the stator.