This paper considers that the most important basic characteristics of the chemical development in the late 50 years of 20tth century are both separation and synthesis on the firstgrade subject.

• 本文认为20世纪后50年化学发展最重要的基本特征是在学科水平上的既分化又综合,产生这一特征的根本原因是科学技术整体化的需要。