Hadoop is implementation framework of cloud computing platform,is an Apache open source software implementation based on Java language cloud development platform,and the data processing software platform,including the massive amounts of data distributed computing of large mass development and operation of computer cluster.By analyzing the Hadoop cloud computing platform in the face of a huge number of the problems existing in the small file shows the Hadoop master node NameNode put files and folders,etc all metadata manage memory,large-scale small file will make the NameNode winner node memory utilization greatly reduce or even lead to system crash.In order to solve this problem,based on the cloud platform Hadoop's own small File solution,is put forward based on the Sequence File and prefetching mechanism of combining the Hadoop mass solution for small files.Experimental results show that the application of the scheme Hadoop cloud platform,file access speed by about 34%,the master node NameNode server memory usage reduced about 15%.