It is impossible to existe for the median mass of Ailigemiao-Xilinhaoteresults from the study on the geology, geochemisty, geophysical field and the earthquacksounding.

The research of Ruoergai middle block (hereinafter with RMB) is subjected to the widespread value in recent years.

In order to solve the problem of time consuming in the encoding process of the basic fractal algorithm, a faster method based on the comparison with a preset block is proposed, which is an improvement of the fast fractal image encoding algorithm based on shape feature: the nearest domain block to a range block is found in the sense of comparing with a preset block instead of shape feature.