本文推荐一种新的垂直胸墙泄水道矩形喇叭口顶缘曲线——悬链曲线，它的水力设计是考虑了进口无漩涡流态、减小水头损失、提高顶缘曲线压力，增大泄量等要求，克服了常规四分之一椭园曲线缺点，有较高实用价值和经济效益 In this paper, we propose a new curve of vertical trumpet-shaped rectangular trumpet flare-catenary, whose hydraulic design considers the eddy flow without import, reduces the head loss, increases the pressure on the top curve and increases the discharge volume And other requirements, to overcome the shortcomings of the conventional quarter-ellipse curve, a higher practical value and economic benefits