The invention provides an analysis method of ultimate toppling failure bearing capacity of a jointed rock slope under the action of seismic force, and belongs to the technical field of rock slope stability analysis. According to the method, the jointed rock slope is used as a research object to calculate horizontal or vertical seismic inertial force of rock centroids according to a principle of a pseudo-static method, that is, the seismic inertial force is a function of slope height, rock centroid height and seismic parameters; normal force, shear force and bending moments of internal force of structural surfaces of rocks are used as unknown quantities to establish force and moment balance equations of the rocks; at the same time, yield conditions of toppling failure of the rocks, shear slips of the structural surfaces and tensile detachment are established, overload coefficients of external loads are combined, and a linear mathematical programming model of the lower-bound method of the ultimate bearing capacity of the jointed rock slope on which the toppling failure occurs under the action of seism is established; and finally, a simplex method is adopted to solve ultimate status of the toppling failure of the slope, and an ultimate load or strength reserve coefficient corresponding to a toppling failure mode can be obtained.