对我国东北地区中生代地层中较为丰富的襀翅目化石昆虫（成虫和稚虫）进行系统分类学研究，首先，完成我国北方中生代地层襀翅目化石物种调查。其次，襀翅目现生昆虫和化石昆虫外部形态结构对比分析，寻找外部形态特征演化的连续性，确定性状极性，从历史发展和地层演化的角度，探索现生与化石阶元的系统发育关系，特别是灭绝科Siberioperlidae，现生科Perlidae，以及现生Nemouroidea的各科和可归入该总科的化石科的亲缘关系。第三，针对襀翅目昆虫（包括现生和化石昆虫）翅脉的多变性，对比化石阶元和现生阶元的翅脉差异，几何形态学方法分析襀翅目种内和种间的差异尺度，确立襀翅目昆虫化石鉴定的翅脉特征的分类标准。最后，补充完善襀翅目昆虫化石和现生阶元的古地理分布，结合襀翅目现生阶元当前的地理分布格局，以及地层学信息，分析襀翅目昆虫现生阶元的起源和迁移，以及现今地理分布格局的形成机制。

We proceed to study the systematic taxonomy on the Mesozoic fossil Plecoptera (adults and nymphs) from the northeast China. First, we will finish the species investigation on the fossil Plecoptera discovered in the Mesozoic strata on northern China. Second, we comparative analysis the external morphological structure of fossil and living Plecoptera, and seek the evolutive continuity of the external morphological characters, and determine the Characteristics of polarity, explore the phylogenetic relationship of extinct and extant Plecoptera taxa through the historical development and stratigraphic evolution perspectives , especially the extinct Siberioperlidae, extant Perlidae, as well as the living taxa of Nemouroidea and fossil taxa classified to this superfamily. Third, aiming at the vein variety of Plecoptera (including living and fossil insects), we use geometric morphology methods to analyze the intraspecific and interspecific differences in scale by observing and contrasting the vein difference of fossil and living taxa, and establish the classification standards of vein on fossil Plecoptera identification. Finally, we complement palaeogeographical distribution of fossil and living taxa, with the current distribution pattern of living taxa and the stratigraphic information, and analyze the origin and migration of the living taxa, as well as the formation on the present geographical distribution pattern.