It is costly, inefficiency and low accurate using traditional rigid assembly tooling for aircraft parts joining. Airliner parts have large structure with high assembling accuracy. Using digital automatic locating technology can complete the accurate locating of aircraft parts, improving the quality and efficiency of aircraft parts assembly with lower manufacture cost. This paper introduces the implement process of digital automatic locating technology and elaborates application process of digital automatic locating technology for forward fuselage of C919 in detail, which has an important reference value for the digital automatic docking assembly of large aircraft parts.