Drawing on the literature on institutional complexity and the literature on technological boundary spanning, we examine how institutional complexity arising from international expansion affects organizational response via technological boundary spanning. We suspect that a high degree of institutional complexity arising from emerging market (EM) multinational enterprises’ (MNEs) expansion to multiple foreign markets has a positive effect on organizational response via technological boundary spanning. This positive effect is positively moderated by top management team (TMT)’s heterogeneity and intense competition in technological domain. We further suspect that the interactive effect of institutional complexity and TMT heterogeneity is stronger for EM MNEs encounter low levels technological competition than those encounter high levels of technological competition. We test our hypotheses using a sample of 760 Chinese firms expanding to 99 overseas markets in the period 2001-2010. The results provide strong supports for our hypotheses. The theoretical implications, the limitations and future directions are provided.