The invention relates to a testing system for fast detecting the reliability of a numerical control rotary table and belongs to the technical field of numerical control machine tool detection. The testing system comprises a mechanical system, a control and data processing system and a hydraulic system, wherein the mechanical system comprises a gantry support, electrohydraulic push rods, mass blocks, a numerical control rotary table, an iron ground platform and the like, the numerical control rotary table is fixed on the iron ground platform, a mass block assembly is eccentrically fixed onto the numerical control rotary table, an axial electrohydraulic push rod assembly and radial and peripheral electrohydraulic push rods are mounted on a testing platform, and a universal wheel is designedon the axial electrohydraulic push rod assembly; the electrohydraulic push rods are connected with the control and data processing system; the numerical control rotary table is connected with the hydraulic system. The testing system has the advantages that the mechanical part adopts bolt connection, the eccentric mass blocks are used to apply a cyclic dynamic load to the numerical control rotary table, the electrohydraulic push rods apply a composite static load and a dynamic load, the system is simple to mount and convenient to control, load application duration and values are larger than values during actual operation, the exposure of the potential faults of the numerical control rotary table is accelerated, and the efficiency of the reliability tests of the numerical control rotary table is increased.