Abstract: According to the geological property of Xihu Trough in the East China Sea, to investigate and set up the calculating method of using logging data strata automatically. Based on the method, to trace after reflection boundary, to calssify strata, to identify electrofacies, and to evaluate automatically abundance of organic matter in hydrocarbon source rock and productivity property in oil and gas bearing reservoir in drilling strata. By the method of using logging data to evaluate strata automatically synthetically the strata of the three wells of Canxue Structure of Sudi Structural Belt in Xihu Trough.