CPM has been widely used in construction industry as a useful tool to schedule the project.But there are some disadvantages with CPM.According to the characteristics of such linear project as highway,railway and so on,linear scheduling method,briefly named LSM,is a useful tool to schedule the linear project.But there are some disadvantages with LSM in the field of its theory and application research at present.Therefore,this paper firstly introduces some basic theories of LSM and suggestions to improve LSM....