Abstract: Research question, in view of the network encryption network, the transfer of the process, when encryption appear delay, delay process, the network node vulnerable to outside attack, cause safety hazard.This paper presents a Feistel algorithm based on improved the data encryption technology, through the key technology to combine traditional divided into four levels, greatly saving algorithm calculated time, solve the problem of time delay.Experimental results show that the new algorithm in computing time, reduced sharply, increased the safety and good results have been achieved.