The utility model provides an upper rotary table in a conical bearing assembly machine, belonging to the technical field of bearing assembly. The upper rotary table can be used for solving the technical problems of complication, not enough practicability and the like of the prior art. The conical bearing assembly machine comprises a rack, a rotary table assembly and an assembly module, wherein the rotary table assembly comprises an upper rotary table and a lower rotary table, the upper rotary table comprises a plate body, a mounting hole for the insertion of a rotating shaft is arranged at the center of the plate body, a plurality of positioning holes are formed in the eccentric position of the upper end surface of the plate body and are distributed uniformly along the circumferential direction by taking the axis of the mounting hole as the circle of center. The upper rotary table has the advantages of being simple in structure, economical, practical, and effectively improving the operation speed of the conical bearing assembly machine.