BACKGROUND As this paper analyzes the mechanism of effects imposed by esports gaming disorder of same-sex partners upon insecure attachment OBJECTIVE the mediating role of fear of missing out (FOMO) in the actor-partner interdependence model (APIM) is discussed in this paper METHODS For this study, altogether 806 valid samples are picked out in the first-tier and second-tier cities in three provinces across China for the survey and investigation RESULTS with results indicating that: esports gaming disorder is significantly and positively correlated to insecure attachment and FOMO; insecure attachment, whether for males or females, mostly originates from the own esports gaming disorder they suffer, and additionally, females are particularly afflicted by the esports gaming disorder that entangles the males. What’s more, FOMO acts as the mediating variable that significantly predicts the insecure attachment of the females CONCLUSIONS In this paper, both theoretical references and model inspirations are provided for subsequent researches on the homosexual group, laying profound significance in understandings of relationships between esports gaming disorder of homosexuals and insure attachment.