Abstract: This article has selected scientific port public companies cost efficiency appraisal index system,in which net value of fixed assets,labor,stockholders' equity and principal business cost are the inputs and port company's net profit,the principal business return,equity per share are outputs.And the appraisal model of the port public companies cost efficiency based on super efficiency CCR-DEA(SUP-CCR-DEA) approach was set up.The characteristic of this paper is:Firstly,the port public companies cost efficiency appraisal index system was established,which included the net fixed asset input and return of stock output,etc.This solved the existing literatures lacking of the research about port public companies cost efficiency appraisal index.Secondly,the SUP-CCR-DEA was adopted to establish the port public companies cost efficiency appraisal model,this solved the problem that existing papers couldrit differentiate the ports since they had the cost efficiency 1.Simultaneously,using the historic data between 2004 and 2005 of 13 China port public companies,the cost efficiency in 2 years was computed successively by the appraisal mo del.The efficiency difference among China port public companies was outlined.The conclusions were arrived as follows:1) China port public companies cost efficiency between 2004 and 2005 was high,and took up 50% of the sample number,and the G Shang Gang port was listed the first.2) China port public companies cost efficiency between 2004 and 2005 was stable,but the G Yantian port improved suddenly and Beihai port and G Tianjin port lowered significantly.

Key words: port public company, cost efficiency, data envelopment analysis/(DEA), appraisal model