The laser deposited additive manufacturing is of a revolutionary significance for aircraft landing gear manufacturing.It has many technical vantages, such as breaching restriction of material specification, reducing waste of original material, and shortening manufacturing time. This technology has obvious advantage and application prospects on rapid trial-manufacture for the future aircraft undercarriage. At present, the key technologies of laser deposited A-100 steel such as forming process, quality control and so on have been breached through. The undercarriage formed by laser deposition has achieved leading application on aircraft. Mechanical properties of parts reached almost that of the forgings. Some keys such as strategy of forming process, control of heat treatment, non-destructive testing, surface strengthening and integrated evaluation, need to be further broken through and solved for extended application of this technology.