| The perjury, which is one of crimes of obstruction of justice, is in a relatively unique position. The others involving evidences are derived from perjury. From three aspects of researches, this paper will help us more accurately grasp the characteristics of the erjury, recognize their similarities and major differences and avoid contradictions and omissions in the legislative process. Firstly, this paper starts with the basic concepts and the natures of the perjury to research and analyze the historical evolution of perjury, comparison of domestic and international legislations and composition and morphology of crime in-depthly. Secondly, through comparisons between perjury and related crimes, this paper makes clearly that the direct objects trespassed by the perjury are the judicial order and national security. Finally, this paper analyzes the compositions and features of perjury in different aspects, such as actors, behavior purposes and behavior means. We ought to understand the true legislative intents and spirits, apply the laws accurately and combate the crimes effectively in the process of judicial practices. Researchs on perjury help to promote the improvement and development of criminal legislation ,uniform legal evaluation of perjury in the criminal, civil, and administrative departments and reunification of substantive law and procedural law to build a scientific and advanced legal system and guide judicial practices correctly. |