Abstract: The quantative stratigraphic dividing and correlating by lithological successions is a data processing method to divide and correlate strata by use of well lithology and comprehensive columnar sections.It includes the one-step Markovian-chain stratigraphic division and the frequency number-reversed inequiweight sliding matching as well as the mutisuccession sliding correlation,the section stretching and the break-point recognition who are used in order to raise the precision of correlation and calculation.This method not only has correct geologic and mathematical models,but also possesses higher practical and spreading values.It has wide prospects for application in realizing interwell automatic correlation between petroleum geologic exploration and well databases.