本发明公开了一种基于吲哚嗪衍生物的复合酸化缓蚀剂复合物及其制备方法；所述复合酸化缓蚀剂复合物包括以下质量份数的组分：吲哚嗪衍生物主剂浓缩母液25％‑35％，复合增效助剂30％‑40％，表面活性剂8％‑12％，助溶剂20％‑25％，其余为水。本发明在发现了吲哚嗪衍生物与多聚甲醛之间存在特有协同增效作用的基础上，将吲哚嗪衍生物作为主剂与多聚甲醛复配，并且采用了保留部分主剂合成溶剂的策略，使用吲哚嗪衍生物主剂浓缩母液增强了溶解分散性，最终得到的复合酸化缓蚀剂复合物添加量低于行业标准要求，且所表现出的缓释性能优于相应评价温度、介质下行业标准对腐蚀速率的要求。

The invention discloses a compound acidizing corrosion inhibitor compound based on indolazine derivative and a preparation method thereof; The compound acidizing corrosion inhibitor complex comprises the following mass components: indolazine derived owner concentrated mother liquor 25% - 35%, compound synergistic additives 30% - 40%, surfactant 8% - 12%, co-solvent 20% - 25%, and the rest is water. On the basis of discovering the unique synergistic effect between indolezine derivative and paraformaldehyde, the indolezine derivative is used as the main agent to compound paraformaldehyde, and the strategy of synthesizing solvent by retaining part of the main agent is adopted, and the mother liquor of indolezine derivative owner is concentrated to enhance the solubility and dispersion. The additive amount of the compound acidizing corrosion inhibitor is lower than the requirements of the industry standard, and the slow release performance is better than the requirements of the industry standard on the corrosion rate under the corresponding evaluation temperature and medium.