The invention provides a high-precision and low-noise thin-walled two-stage split herringbone gear technique. The technique of the herringbone gear includes the steps of turning and rolling process, heat treatment process, inner hole grinding machining process, and gear grinding process; specifically, during the turning and rolling process, firstly gear surface is subjected to marked lines in themiddle to make gear grinding allowance be distributed evenly; after the inner hole grinding machining process, the inner hole color eating and size inspection are carried out by using a taper gauge soas to make a color eating area of the inner hole and a taper reach over 90%; and the gear grinding process includes steps of press fitting and gear grinding; and during the press fitting step, combined tooling is used for ensuring that a gear state is consistent with an assembling state in the gear grinding process, and ensuring that the evaluation indexes of a gear part meet the accuracy requirements of the ISO13283 level in a loading test.