The invention belongs to the technical field of auto parts, and relates to a fuel delivery pump with a floated cycloid rotor. The fuel delivery pump with the suspended cycloid rotor comprises a fuel delivery pump body, an outer rotor, an inner rotor and a universal joint. The fuel delivery pump body is in an integral structure. A transverse guide groove is reserved on the bottom surface of a pump inner cavity between the upper portion of a right wall of a low pressure oil cavity and the inner wall of the pump inner cavity. Seven axial through grooves on the outer wall of the outer rotor are distributed at central radial positions of inner wall tooth sections of the outer rotor. When the inner rotor and the outer rotor rotate, fuel flows along the transverse guide groove and the axial through grooves to positions to be lubricated. An oil film is formed between the outer wall of the outer rotor and the inner wall of the pump inner cavity, the outer rotor cannot be contacted with the fuel delivery pump directly under the action of liquid surface tension, the outer rotor is floated in the fuel delivery pump body, and accordingly friction between the outer rotor and the fuel delivery pump body is avoided, and the service life of the fuel delivery pump is prolonged. The fuel delivery pump with the suspended cycloid rotor is stable in operation, low in pulsating, low in noise and high in volume efficiency, and is applicable to automotive diesel engine fuel injection systems.