Abstract: Using existing railway has the advantages of easy implementation and quick effect, but difficulty lies in how to effectively and reasonably formulate an operation scheme for suburban trains. Through sorting out relevant domestic cases, key issues are put forward for research, including relationship between railway and city, measures to improve suburban train service level, channel capacity of existing railway and operation scheme for suburban trains, operation management mode of suburban trains, benefit analysis of suburban trains. Taking Jinhua City using existing railway for operating suburban trains as an example, reasonable, effective and economic measures are put forward.