For large incline and horizontal section, cuttings are easy to deposit at the bottom of wellbore and form cuttings bed with a certain height, which makes drill pipe buried, resulting in increasing friction resistance of drill pipe and fracture of drill pipe.A jet cuttings bed cleaning tool was designed based on the liquid-solid two-phase flow theory. The simulation model of 3D jet cuttings cleaning tool and ordinary rock-carrying drill pipe was established. Fluent was used to analyze the influence of parameters such as nozzle injection angle, nozzle velocity, cuttings particle size and drilling fluid displacement on cuttings volume fraction and cuttings quality in annulus wellbore. The results show that the cuttings deposition in the annulus decreases significantly with the addition of the pulsed jet tool, and the optimal nozzle angle is 90° at the drill pipe speed of 80 r/min. Cuttings quality in annulus can be reduced by increasing nozzle velocity and drilling fluid displacement. As the cuttings particle size increases, more cuttings are deposited in the annulus. This tool can be used to reduce the cuttings deposited in the annulus and improve the cuttings migration ability.