NTFS（英语：New Technology File System），是Windows NT及之后的基于NT内核发展的Windows标准文档系统。

NTFS取代文档分配表（FAT）文档系统，为目前Microsoft的Windows系列操作系统的主要文档系统。NTFS在FAT和HPFS（高性能文档系统）的基础上进行一系列改进（如支持元数据）并且使用更复杂的数据结构（B+树）以便于提升性能、改善可靠性并降低磁盘空间利用率。NTFS还同时提供若干附加的扩展功能，如访问控制列表和文档系统日志。有关NTFS的详细设计规范则是属于商业秘密。

NTFS (New Technology File System) is a proprietary file system developed by Microsoft. Starting with Windows NT 3.1, it is the default file system of Windows NT family.

NTFS has several technical improvements over FAT and HPFS (High Performance File System), the file systems that it superseded, such as improved support for metadata, and the use of advanced data structures to improve performance, reliability, and disk space utilization, plus additional extensions, such as security access control lists (ACL) and file system journaling.