搜索并统计分析了中国科协所属954种科技期刊中OA期刊的数量、上网形式、学科分布、类别分布、开放全文的回溯年代、期数、篇数、时滞等，并与2007的统计结果相比较。结果表明，2009年中国科协OA期刊数量由2007年的140种增加到206种，其中有2007年以来延续OA的期刊117种，另有89种为近两年新增。与2007年相比，中国科协OA期刊开放全文的期数、篇数等均有较大幅度的增加。OA期刊总被引频次、影响因子和即年指标的5年平均增长率分别高于非OA期刊11.6、5.6和2.1个百分点，说明实现OA可切实提高期刊的学术影响力。问卷调查表明，OA对期刊发行收入和运营成本的影响以“基本持平”为主。

We searched and analyzed the open access (OA) publishing situation of journals sponsored by China Association for Science and Technology (CAST) in 2009, such as the numbers of OA journals, the first-level online domain names, the distributions of journal’s discipline and class, the years from which archival content is freely available, the numbers of issues and articles freely available, and the timing of OA journals having a free online version. Compared with the analying results in 2007, we found that the numbers of OA journals increased from 140 to 206 in the last two years; 117 of these were the OA journals in 2007. The numbers of issues and articles freely available also had a large increment. The 5 year’s increasing rates of total citations, IFs and immediacy indexes for OA journals were higher than those of non-OA journals about 11.6, 5.6 and 2.1 percent, respectively. We conclude that the OA publishing model may be helpful in enhancing the journal’s visibility and accessibility, and thus increasing citations. The questionnaire survey showed that OA publishing model didn’t significantly affect the journal’s circulation income and the cost of management.