The insect is the largest biota group in the world, but so far without its own geographical regionalization scheme. This paper quantitatively analyzes the distribution pattern of the world insects to work out a geographical regionalization scheme for worldwide insects. According to the topography, the climate and other ecological conditions, the continents of the world are divided into 67 basic geographic units (excluding Antarctica). Using our similarity general formula (SGF) and the multivariate similarity clustering analysis（MSCA）method, the distributional data of the total 31 orders 1208 families 104344 insect genera are analyzed. The clustering results of the MSCA method see distinct hierarchies. The level of similarity is 0.300 and 0.200, respectively, 67 BGUs are gathered into 20 small unit crowds and seven big unit crowds; The composition of each crowd is adjacent, with no "noise" and "enclaves"; the ecological environment conditions of each crowd are relatively independent of each other; and each crowd has its own endemic of the insect group. According to the clustering results of the MSCA, the first global insect geographical regionalization scheme is worked out, including seven kingdoms and 20 subkingdoms. The insect fauna characteristics of every kingdom and subkingdom are analyzed.

insect distribution  /  clustering analysis  /  biogeographical division