Acidizing stimulation technology is an effective measure to improve oil production and an important means of developing oil and gas bearing formation. The water test is not ideal, after the completion of HD-39B geothermal well. The acidizing technology was used based on the analysis on the comprehensive logging data and combined with the formation conditions, cracks were extended and geothermal reservoir channels were linked up, HD-39B turned to be of high-quality with the water yield being from 5.4m3 /h to 80.83m3 /h, wellhead water temperature from 50℃ to 72℃. The application practice shows that the acidizing technology is also suitable for carbonate bedrock fracture geothermal well, which can be popularized in the similar geothermal construction according to the actual conditions and the lithologic characters.