The invention discloses a measurement and machining integrated clamping device for conical thin-wall rotating parts, belongs to the field of machining, and relates to a precise clamping device for conical thin-wall rotating body coating layer parts with special machining requirements; and the device can perform reliable clamping and precise positioning on a two-dimensional rotating worktable or amechanical arm flange plate. The clamping device consists of a primary positioning part, a positioning clamping part and a mounting part. The positioning clamping part is provided with four positioning clamping components with the same components; the positioning clamping components and workpieces are in point contact; and through cooperation of the four positioning clamping parts, the workpiecesare totally positioned and reliably clamped. The device can effectively guarantee positioning and clamping of the conical thin-wall rotating body parts, can realize measurement of clamping force and support counter force of the workpieces by once clamping and precise machining of inner and outer surfaces of the parts, is simple in operation and reliable in performance, and achieves a key effect onhigh-quality and high-precision machining of the parts.