Binary translation is applied for the legacy code porting. Binary code can be executed in different hardware platforms by binary translation. If the source platform uses condition code to change the execution flow, it is an important performance issue to handle the condition code translation. This paper presents the algorithm of Eflag linear analysis. The complexity of the algorithm is linear and the algorithm reduces much of the flag computing and increases the performance of the dynamic execution. Through dynamic profiling, the algorithm solves to eliminate the Eflag calculation in the basic indirect jump block. Some integer test cases are analyzed in spec 2000. The experimental results prove the efficiency of the EfLA (Eflag linear analysis) for large calculation program.