The invention relates to a radial force balancing method for a shaftless shield pump, and relates to the technical field of shield pumps, a lubricating bearing area of a rotor is set as a surface A, the unit of the
diameter of the surface A is m, the unit of the length of the surface A is L, the unit of the surface A is m, the
viscosity of a fluid medium conveyed by the pump is Pa.s, the unit of the
viscosity of a fluid medium conveyed by the pump is Pa.s, and the unit of the
angular velocity of the rotor when the pump runs under a designed working condition is rad / s. Obtaining the maximum radial
bearing capacity, namely obtaining the maximum radial
bearing capacity borne by the rotor; wherein the unit is the unilateral gap of the bearing area, and m is the maximum eccentricity rate of the rotor; and a judgment step: setting the maximum radial force borne by the rotor under the design working condition as shown in the specification, if so, determining that the currently designed sum L can meet the
lubrication effect in the pump, and if not, adjusting the sum L until the sum L is equal to or smaller than the sum L. The lubricating oil has the
advantage that an effective and stable lubricating film can be formed between the lubricating oil and the lubricating oil.