对1995年度出版的6种热作科技期刊所载论文文后引文的出版年龄进行统计分析，初步探索热作科技文献的老化规律。结果表明，近7.75年的热作科技文献就可满足文献引用需求的50％；近10a的文献可满足文献引用需求的61．64％；近20a的文献可满足文献引用需求的88．04％；近30a的文献可满足文献引用需求的95．00％。 A statistical analysis was made on the publication age of citations of articles published in the six hot science and technology journals published in 1995, and the aging laws of hot science and technology literature were tentatively explored. The results show that nearly 7.575 years of hot science and technology literature can meet the needs of the literature cited 50%; nearly 10 years of literature can meet the needs of the literature cited 61.64%; nearly 20 years of literature to meet the needs of the literature cited 88.04% The literature of the past 30 years can meet 95.00% of the quoted demand of the literature.