Horizontal reinforcement of the slopes is one of the most widely used reinforcement methods. In this paper, the stability of the new-type reinforced soil slope is analyzed by morgensternprice horizontal bar division method, and the expressions of safety coefficient Fs and proportionality coefficient divisor are derived respectively according to the balance of bar force and moment, and the calculation results are obtained by iteration. Through the comparison and analysis of the numerical examples of horizontal slitting and horizontal Sweden method, the feasibility of this method is proved, which provides theoretical reference for reinforcement technology of slope engineering.