The invention discloses a high-precision complex thin-walled workpiece intelligent turning unit, which includes a charging and discharging unit, a double-main-shaft automatic machining unit, a truss robot unit, a built-in detection module, an automatic compensation module and a PLC control system, wherein the truss robot unit is arranged between the charging and discharging unit and the double-main-shaft automatic machining unit; the built-in detection module is arranged inside the double-main-shaft automatic machining unit; the automatic compensation module is arranged inside the double-main-shaft automatic machining unit; and the PLC control system is connected with the charging and discharging unit, the double-main-shaft automatic machining unit, the truss robot unit, the built-in detection module and the automatic compensation module respectively. According to the invention, all the unit control system interactions are integrated, and an end socket is fully and automatically machined, and the high-precision complex thin-walled workpiece intelligent turning unit has the characteristics of one man operation and convenience in use; and processes for part inner holes and appearances are completed by one-step clamping, so that the forming coaxiality for inner and outer ellipsoids can be guaranteed; the part outer ellipsoid and spherical surface internal groove machining can be completed by single pass, so that the requirement on wall thickness precision is guaranteed, the production efficiency is greatly improved, and the labor intensity is reduced.