The deep well drilling technology has a rapid development nowadays and becomes more mature. But some downhole accidents still inevitably happen in the construction process of geothermal wells. The accident causes should be seriously and carefully analyzed to develop target treatment programs and procedures for scientific and reasonable treatment. Taking the frequent hole sticking accident of geothermal well construction in Jinzhong as an engineering case, the paper analyzed different accident causes and worked out the sticking accident treatment methods. Based on the releasing mechanism, the performance of oil-based sticking releasing agent and configuration method were set up, injection volume was accurately calculated and key points of the injection technology were mastered in the operation, good effect of treatment was received.