Near the Zhijin County Town, the phase changes in the Induan age of Early Cambrian, the two sides of the transformation band are limestone in the second section of Yelang Formation and dolomite in the first section of Anshun Formation. In this paper, the geologic characteristic of this transformation band is introduced, it analysis the gentle slope-pattern carbonate environment and points out this transformation band is the earliest of Early Cambrian in Guizhou Province and its geologic significance is discussed.