| Coal will be main part of Energy sources structure in our country for the future. With the rapid development of national economy, the requirement of coal will rise with steady steps. At the same time, railroad transportation demand will be higher also. It is important for the rail project to study heavy haul railroad transportation mode combining our country rail transportation status on the condition of existing bigger gap with developed country on the aspect of heavy haul technology.Da-Qin line is the first double-tracking and electrification railroad for running heavy-haul unit train and important route for the western coal transportation in our country. From the year 1998 to 2002, freight volume reached 788060 thousand ton, in 2003, broke through a hundred million ton. It will bring important and profound influence on the course of modernization of china railway to increase the Da-Qin railway freight volume, build it into demonstration former and symbol project during railway spanning development today. Because of large investment for enlarging capacity of heavy-haul and technology dropping behind the increasing demand, challenge is huge to the objective of 2 hundred million ton. Hence transportation organization mode must be studied on software.The paper reviews circumstances of dredging Da-Qin railway since 10 years, sets forth the significance of reconstructing Da-Qin railway and enlarging capacity, conducts present general situation particularly. Based on 20000 tons heavy-haul transportation organization mode and coal transportation quantity and direction analysis, calculating capacity, author brings forward the feasibility to run 20000t heavy-haul transportation organization mode. At the same time, author brings the measures of perfecting safe ensuring system for Da-Qin railway, enhancing safety management.
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