文章分析了图书出版合同有效期采取较短的固定期限方式存在的弊端;认为延长合同有效期有利于发挥图书的市场价值,使作者和出版者获得更多利益;按需印刷、数字出版技术的推动,使延长合同有效期更显必要。文中提出了在兼顾作者与出版者利益的前提下,恰当延长合同有效期的合理表述方式。 The article analyzes the drawbacks that the effective period of the book publishing adopts a shorter fixed term method. It is believed that extending the contract validity period is beneficial to the market value of the book, so that the author and the publisher can obtain more benefits. On the basis of the demand printing and the digital publishing technology, It is even more necessary to extend the validity of the contract. The paper puts forward a reasonable way to extend the validity period of the contract properly, taking into account the interests of authors and publishers.