Research methods: Surveying the existing railway by coordinate method，the core of the new technique are basing on humanity and safety , as well as cutting down the counts of surveyors. It can set the prism freely when you survey the existing railway by coordinate method. But， a separate rectangular coordinate system should be built for each cure. By this means，the measuring of mileages， the direction of railway , the little partial angle，the altitude of rail surface can be given at the same time.
Research results: Surveying the existing railway by coordinate method，the numbers of the operation flow are reduced from 5 to 2. Meanwhile，the numbers of operator are reduced from 31 to 13.Finishing the same workload , the numbers of operator are diminished 18. The numbers of the operator on line are reduced from 23 to 4. The numbers of the operator in the center of rail , where is the most dangerous，are reduced from 8 to 0. So，the factor of dangerous is mostly reduced.
Research conclusions: There are many advantages in safe producing controlling of precision and efficiency for existing railway's new measuring techniques. The aims of technique renovation are to achieve electronic records，reduce man- made errors，come true the integration of survey and design，safe production and improve benefits.
2007, Vol. 24 
