Abstract: Interlayer production imbalance existed in commingling production of Jingbian gas field, it is of great significance to make clear the recovery factor status of interlayer recovery and the influencing factors of recovery factor for balanced production, potential tapping adjustment and enhanced recovery factor of gas field.Taking well area A of Jingbian gas field as an example, by using drilling, logging interpretation and production performance data, based on the calculation of geological reserves and dynamic reserves, dynamic reserves analysis method and correlation analysis technology are used to study the interlayer recovery factor and its influencing factors. The results show that the recovery ratio of small layers varies greatly under the condition of multi-layer commingled production in Jingbian gas field. The recovery factor of the small layers shows a pattern of one high and the rest low, and the recovery factor of small layers is mainly controlled by reservoir physical properties, especially permeability, but not closely related to effective thickness and gas saturation.