The utility model discloses a radial endoluminal support structure of hydraulic generator field coil comprises upper end supporting shoe, lower extreme supporting shoe, fixing bolt, lock washer, magnetic pole T tail, magnetic pole shell feed plate, magnetic pole dog, brake hoop. The utility model discloses an upper and lower end supporting shoe is insulation board processing and forms, and compressive stress is only held tightly sending out between motor magnetic pole shell feed plate and the yoke in the support arm top of upper end supporting shoe, and the lower extreme supporting shoe is fixed on the magnetic pole axial dog of yoke drive end. Upper and lower end supporting shoe is widened with a support arm of sending out the contact of motor magnetic pole shell feed plate, and the entadradial force that can bear field coil more uniformly sets up the entad radial force that radial supporting shoe can bear the field coil both ends in the field coil upper end respectively with the lower extreme, and this structure can prevent effectively that generator field coil under specific operating mode from taking place to warp to the radial electromagnetic force at generator rotor center,and easily installs.