软件维护（Software maintenance）是一个软件工程名词，是指在软件产品发布后，因修正错误、提升性能或其他属性而进行的软件修改。

一般认为软件维护只和修正错误有关。不过有研究指出80%的软件维护工作是用在非纠正性的行动。

软件维护同时包括管理层面及技术层面。管理层面的问题包括：配合客户的优先级、人员配置及费用估计。技术层面的问题包括：对需求、系统或问题有限的理解、影响分析、测试以及可维护性的量测。

Software maintenance in software engineering is the modification of a software product after delivery to correct faults, to improve performance or other attributes.

A common pe****tion of maintenance is that it merely involves fixing defects. However, one study indicated that over 80% of maintenance effort is used for non-corrective actions. This pe****tion is perpetuated by users submitting problem reports that in reality are functionality enhancements to the system. More recent studies put the bug-fixing proportion closer to 21%.