Softening agent as well as preparation method and application thereof

The invention relates to a softening agent as well as a preparation method and application thereof. The preparation method of the softening agent comprises the following steps: mixing polybasic acid, first liquid amine, second liquid amine, a fatty acid compound, a catalyst and a solvent, and reacting to obtain an intermediate product; and adding a quaternization reagent into the intermediate product, and reacting to obtain the softening agent. When the softening agent obtained by the preparation method is used for finishing a fabric, the fabric can have excellent hand feeling, yellowing performance, color change performance and hydrophilic performance at the same time. 本发明涉及一种柔软剂及其制备方法和应用。其中，柔软剂的制备方法，包括以下步骤：将多元酸、第一液体胺、第二液体胺、脂肪酸类化合物、催化剂以及溶剂混合并进行反应，得到中间体产物；向所述中间体产物中加入季铵化试剂并进行反应，得到柔软剂。采用本发明所述制备方法得到的柔软剂整理织物，可使织物能够同时具有优异的手感、黄变性能、色变性能以及亲水性能。