语言是人们最重要的交际工具，也是时代最敏感和最活跃的部分，在当前数字化快速发展的时代，许多新词和新用法接连涌现且迅速传播，句末语气词“哈”就是其中的典型代表。语气词“哈”作为汉语表情达意的方式，已经从方言渗入普通话且逐步活跃于网络交际当中，或缓和语气，或增强互动，或表达情感，无论将其放在疑问句、陈述句还是祈使句之中，都有其独特的意义与功能。本文聚焦于网络用语中的“哈”，从语法、语用等多角度剖析其功能与成因，旨在揭开“哈”的神秘面纱，为网络交流提供有益参考。

Language is the most important communication tool for people and also the most sensitive and dynamic part of an era. In the current era of rapid digital development, many new words and new usages keep emerging and spreading rapidly. The sentence-ending particle "Ha" is a typical representative among them. As a way of expressing emotions and intentions in Chinese， "Ha" has seeped from dialects into Mandarin and gradually become active in online communication. It can moderate the tone， enhance interaction，or express emotions. Whether placed in a question，statement or imperative sentence， it has its unique meaning and function. This article focuses on the "Ha" in online language and analyzes its functions and causes from multiple perspectives such as grammar and pragmatics， aiming to unveil the mystery of "Ha" and provide useful references for online communication.