Abstract:With the development of globalization and modernization, biotic homogenization (BH, referring to the process by which the taxonomic, genetic or functional similarities of regional biotas increase over time) pervasively occurs worldwide. BH seriously challenges the conservations of biodiversity and germplasm resources. Human activities are the principle cause of current global BH. Agriculture directly cause pervasive BH in agro-ecosystems worldwide. Land reclamation usually results in great decease of biodiversity. And BH caused by large areas of homogenized crop species, varieties and tillage management, heavy use of pesticides and fertilizers, mechanization, intensification and the popularizing of genetically modified crops seriously challenges the crop production and security. Unfortunately, information about BH situation, occurrence and trend in agro-ecosystems is rare. And thus the relative study is very urgent, in particular that the agricultural model in China is undergoing dramatic changes. Urbanization generally leads to large areas of uniform artificial habitats and habitat degradation which directly cause pervasive BH. Human-induced species distributions and extinctions can also directly cause BH, such as biological invasions and extinctions and the serious spread of local generalists and new hybrids. Generally speaking, in large scale, indigenous species lean to cause BH, while in small scale they may cause biotic differentiation. China is undoubtedly suffering from pervasive BH, however, relative research has not initiated. Currently, it is urgent to conduct BH researches in China to: (1) establish effective BH assessing model; (2) understand the BH situations of major ecosystems and species groups; (3) understand situation, regulation and trend of BH in arable lands, and (4) excavate, build and improve the relative database for BH researches.