Abstract: In order to solve the poor quality of cementing production casing of horizontal wells, the gas channeling control property design of the cement slurry was taken as the break point, and the influence of different cement slurry to gas channeling was analyzed through lab experiments. And the adaptability of evaluation methods for gas channeling control was evaluated. Then the multi-factor evaluation method was put forward for gas channeling control performance of cement slurry on horizontal wells, considering the horizontal well trajectory features. It was the evaluation method for modified A value or SPN value under none free water and filter loss less than 50 mL. The successful application of the new method on cementing the middle-shallow horizontal wells in West Sichuan area provided a theoretical direction for the horizontal well cementing in West Sichuan.