Abstract: This review summarizes eight kinds of Ziegler-Natta catalysts for Unipol gas-phase process of polyethylene production together with the analysis of their advantages and disadvantages. M catalyst is widely applied，while its catalytic activity is low. BCG-IV catalyst shows high initial and total activities for the addition of accelerator during catalyst preparation. SCG-1 catalyst has moderate activity，while its preparation is simple. GM catalyst has high catalytic activity and the polymer produced has high bulk density owing to the introduction of special electron donor during the activiting process of carriers. However，J catalyst is the leading direction of Unipol process catalyst development for its outstanding performance. BCS-02 is more suitable for condensated state operation. Preparation of BCS-01 catalyst is unique，while requires demanding preparation conditions. SLC catalyst，without the application of silica gel carriers，shows high catalytic efficiency with greatly reduced production cost. Some suggestions to promote the development and localization of Unipol process catalysts are proposed.

摘要： 综述了8种适用于Unipol工艺气相聚乙烯Ziegler-Natta催化剂的制备路线，分析了各催化剂的优缺点：M催化剂应用范围广，但活性低；BCG-Ⅳ催化剂制备中加入促进剂，初始活性和总活性都高；SCG-1催化剂制备工艺简单，活性适中；GM催化剂在载体活化过程中引入了特殊结构的给电子体，催化剂活性高、聚合物堆积密度也高；J催化剂性能优异，是Unipol工艺催化剂的发展方向；BCS-02催化剂较适合冷凝态操作；BCS-01催化剂制备工艺独特，但制备条件要求高；SLC-S催化剂不以硅胶作为载体，在保证催化剂高效率的同时，成本大大降低。对我国Unipol工艺Ziegler-Natta催化剂的研究及国产化提出了建议。