Qingyang Gas Field is a typical deep tight sandstone gas reservoir with a reservoir burial depth of more than 4,000 m. Water production is common in gas wells, which severely restricts the development efficiency of the gas field. Accurately determining the critical liquid-carrying flow rate and predicting liquid accumulation in gas wells in advance is the key to ensuring the efficient production of deep tight gas wells.This paper systematically compares several classic critical liquid-carrying flow models at home and abroad, such as the Turner model, the Li Min model, and the Wang Yizhong model, and analyzes the advantages and limitations of each model when applied to deep gas reservoirs. Based on the measured production data of gas wells in the Qingyang Gas Field and combined with the water production characteristics of the gas wells, it is found that there is a significant positive correlation between the critical liquid-carrying flow rate and the water-gas ratio in this gas field.Accordingly, a new calculation model of the critical liquid-carrying flow rate considering the factor of the water-gas ratio is constructed, and the model coefficients are optimized by comparing the errors between the predicted values of each model and the measured data. The results show that the prediction error of the new model is significantly lower than that of the traditional models, and it has better applicability in the Qingyang Gas Field. It can be effectively used to judge the liquid accumulation in gas wells and provides a scientific basis for the rational selection of the drainage and gas production process on site.