The depth data logged again from China Continental Scientific Drilling (CCSD) progressive CCSD-1 well after the completion of the first 0～2 000 m drilling plan are different from the data measured last time. Corrections must be made for the veracity of the logging data. In this paper, the logging data were pre-processed before the correction, and several methods were applied for analysis during the correction. The results of correction are satisfactory and fully meet the required precision. It is shown that the correction analysis is an effective method for correction. Nevertheless, the processing of the parts with obvious different logging curve shapes needs further investigation. The whole process is automatically done on computer, and the technique can obviously improve the data-processing efficiency.