Understanding of the fishing behaviour and the dynamic information on fishing ground of Antarctic krill fishery can provide an important support to modeling the interaction between fishery and ecosystem. Based on the data of Antarctic krill fishery in 2009/2010 to 2011/2012 fishing season collected by the fishery observers, the present study analyzes the fishing ground dynamics of Chinese Antarctic krill fishery and the behaviour pattern of fishing vessels using the barycenter of fishing ground. The results show that the main fishing ground is shifted from subarea 48.1 to subarea 48.2 during 2009/2010 to 2011/2012 fishing season in view of fishing net, but the reverse trend can be found for the catch. The barycenter of fishing ground in the 10 day period has only occurred in 4 SSMUs (APDPW, APDPE, APBSE and SOW), although the fishing sites are located in 6 SSMUs. The selection of fishing ground of Chinese Antarctic krill fishery is affected by local abundance of Antarctic krill and predetermined decision making, the condition of fishing vessel and marketing factors.