本文提出加固吹填软粘土地基的新方法———水平向排水加固。基于Ｔｅｒｚａｇｈｉ－Ｒｅｎｄｕｌｉｃ准固结理论，采用Ｐ－Ｒ交替方向隐格式有限差分法进行数值解，并分析吹填区外水位变化及排水通道自身阻力对固结的影响。通过一个算例的计算分析，说明新方法是有效的、可行的。 This paper proposes a new method for reinforcement of blow-filled soft clay ground—horizontal drainage reinforcement. Based on the Terzaghi-Rendulic quasi-consolidation theory, the P-R alternating direction implicit scheme finite difference method is used for numerical solution, and the influence of the change of water level outside the blow zone and the self-resistance of the drainage channel on the consolidation is analyzed. Through calculation and analysis of a calculation example, it shows that the new method is effective and feasible.