The invention provides a thin-walled elongated pipe member whole precision processing method. The thin-walled elongated pipe member whole precision processing method comprises the following steps of S1, blanking; S2, hot working; S3, rough turning of the end face and the outer circle; S4, drilling and boring of an inner hole; S5, honing of the inner hole; S6, semi-finish turning and finish turningof the outer circle; S7, fine grinding of the outer circle; S8, micro-extrusion correction; S9, finish turning of the end face; and S10, inspection and packaging. By means of the method, the whole precision machining of thin-walled elongated pipe members which are made of austenitic stainless steel materials, have the maximum length being 575 mm, have the minimum pipe diameter being 24 mm, have the maximum draw ratio being 24 and have the thinnest wall thickness being 0.3 mm can be achieved, and the inner hole and outer circle precision reaches the IT5 stage, the coaxiality reaches 0.025 mm,the straightness reaches 0.025mm, the surface roughness reaches Ra0.8, and the method is a high-efficiency, precise and low-cost thin-walled elongated pipe member processing method.