Existing studies have primarily focused on the intra-firm effects of intelligent manufacturing transformation， paying little attention to its impact on green innovation from an inter-firm interaction perspective. In particular， there is a lack of systematic analysis on the differentiated effects between the R&D stage and the commercialization stage of green innovation. It used a sample of A-share listed manufacturing companies in China from 2012 to 2022 to examine the peer effects of intelligent manufacturing transformation and their impacts on the two-stage green innovation， and to further explore the underlying mechanisms and heterogeneity. The results show that intelligent manufacturing transformation exhibits significant peer effects， which substantially enhance green innovation at both the R&D and commercialization stages. The mechanism analyses indicate that peer effects of intelligent manufacturing transformation promote the two-stage green innovation mainly through three channels： technology integration， competitive pressure transmission， and resource factor allocation. Heterogeneity test shows peer effects are more pronounced in economically developed regions， and state-owned enterprises demonstrate advantages in green innovation R&D investment， whereas non-state-owned enterprises are more active in expanding green innovation application scenarios and diffusing technological outcomes. It elucidates the stage-specific impacts of peer environments of intelligent manufacturing on firms’ green innovation， providing policy-relevant insights to guide governments in designing differentiated intelligent manufacturing promotion policies.