本文综述了我国海带工业利用及其废弃物利用的现状，重点分析了海带渣作为罗非鱼饲料成分的利用价值，对褐藻胶过滤废渣和甘露醇废液中钾盐的利用前景进行了展望。 This paper reviewed the utilization of kelp in our country and the status quo of its waste utilization. The utilization value of kelp residue as tilapia feed ingredient was analyzed emphatically. The prospect of utilization of potassium salt in alginate filter residue and mannitol waste liquor was prospected.