Abstract: Based on the Long Tail Theory,the article explores the CRM implementation strategies of the small and medium-sized enterprises confronting with the new challenges of CRM in the network environment.Major aspects covered in the research are the changing role of management-from ‘actively targeting' to relatively ‘passively acquiring',the adjustment of the target customer-from ‘the mainstream customer' to ‘the potential niche and individuals',the building of resource network-from ‘the internal limited' to ‘the external unlimited'.The study aims to provide certain practical references for the small and medium-sized enterprises in regard to gaining customer loyalty and improving entrepreneurs' competitiveness.