The state has been continuously strengthening anti-monopoly law enforcement in recent years.Urban gas,as a representative field among public utilities,is the major concern in anti-monopoly.Thus,the anti-monopoly in this field is increasingly crucial.In order to further implement this anti-monopoly to promote quality industrial evolution,the national anti-monopoly supervision in this field was reviewed and different types of monopoly behaviors were summed up.Then,current laws and regulations related to this supervision were sorted out,and many classic anti-monopoly law enforcement cases were analyzed.Several remarkable problems were put forward.In addition,dependent on anti-monopoly supervision in the field of urban gas,three suggestions have been made to the government's regulatory authorities,gas industry associa-tions,and urban-gas enterprises.First,the government shall appropriately seek market-oriented reforms in the urban-gas field,and constantly improve related supporting mechanisms on industrial anti-monopoly.And anti-monopoly supervising organizations and industrial supervising authorities shall implement scientific supervision fully and emphasize on supervi-sion-punishment balance.Second,gas mass organizations represented by gas associations shall advocate system construc-tion to avoid monopoly behaviors and perform anti-monopoly publicity and communication actively.At last,the inside check against anti-monopoly shall be strengthened by the urban-gas enterprises to perfect the anti-monopoly compliance system and give properly response to users'complaints and anti-monopoly investigation.