To ensure the green growth of new ventures and from the perspective of organizational legitimacy, the study tests the impact of environmental ethics on new venture green growth performance and boundary conditions through the questionnaires on 223 new venture by using moderated path analysis and a mediated moderation model. Research results show that environmental ethic has an inverted u-shape effect on new venture green growth performance and the green relational capital shows an indirect mediating role between environmental ethics and new venture green growth performance; environmental scanning moderates the invert-U relationship between environmental ethics and new venture green growth performance, and green relational capital partially mediates the moderating effect of environmental scanning in the invert-U relationship between environmental ethics and new venture green growth performance.