> For the complete documentation index, see [llms.txt](https://overleaf-pro.ayaka.space/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://overleaf-pro.ayaka.space/latex/zh-cn/latex-cuo-wu/19-latex-error-unknown-float-option-h.md).

# LaTeX 错误：未知的浮动体选项 \`H'

当你忘记加载 **`float`** 宏包时，就会出现此错误。每当我们使用一个 *float* 例如图或表，也就是 **`H`** 中插入一个 **`\begin{figure}[H]`**。 **`H`** 浮动体位置参数是 **`float`** 宏包。它告诉编译器将图放在页面上的确切位置，而不是移动到别处。每当我们想使用此选项时，必须包含 **`\usepackage{float}`** 在导言区中。要了解更多关于如何使用选项来指定浮动体位置的信息，请查看我们的 [文档](/latex/zh-cn/tu-biao-he-biao-ge/02-positioning-images-and-tables.md).

## 常见原因

**忘记加载 `float` 宏包的示例代码：**

该 [float 宏包](https://www.ctan.org/pkg/float?lang=en) 为我们提供了 `H` 选项。这是 `h`，并告诉 LaTeX 我们希望该图出现 *完全* 在这里。如果我们使用 `H` 选项，但忘记包含 `\usepackage{float}` 在导言区中，我们将得到如下所示的错误

main.tex，第 12 行

LaTeX 错误：未知的浮动体选项 \`H'。

请参阅 LaTeX 手册或《LaTeX Companion》以获取说明。输入 H 可立即获得帮助。... l.10 \begin{figure}\[H] 选项 \`H' 被忽略，并使用了 \`p'。

要解决此错误，我们只需包含 **`\usepackage{float}`** 在文档的导言区中，即在 **`\begin{document}`**


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