A catalytic and step economic protocol for the construction of N‐2‐aryl‐naphthotriazoles via copper‐catalyzed cyclization of aryl amines and aryldiazonium salts is reported. With dioxygen in the air as termial oxidants under copper catalysis, various N‐2‐aryl‐naphthotriazoles were synthesized in high yields. Importantly, this protocol features the sufficient inhibition of the classic C‐N2 bond cleavage