In the initial stage of shale gas well development, the production is high, and most of the wells are put into production directly with empty casing, which can effectively work with liquid.Under the production system of pressure release, wellhead pressure quickly drops to the transportation pressure, and then abnormal production with liquid occurs, resulting in fluid accumulation in wellbore, or even water logging and finally a sharp decrease in the life cycle of gas wells.Therefore, it is necessary to put into production the tubing and carry out subsequent drainage & gas recovery process.For production of low pressure miscarried in the late stage, research on wellbore effusion diagnosis technology is conducted and combined with a large number of field application analysis, the law of the shale gas effusion at middle and later periods is explored.Technical requirements such as the timing, size, structure and depth of tubing are proposed, and follow-up foam drainage and injection technique, drainage gas recovery of plunger lifting technique are also presented.According to the field application, the gas production can be increased up to 22% after using foam drainage technique, and the application of plunger lifting technique can slow down the decline rate of gas production.At present, an efficient, safe and economical shale gas well drainage and production technique has been preliminarily formed, which has effectively improved the overall domestic development level of shale gas.