双钩叶科（拉丁语：Dioncophyllaceae）共有3属3种（3个单种属），皆生长在非洲西部热带地区的雨林中。

本科植物为藤本植物；单叶互生，无托叶，革质，叶子中脉长出两个类似钩子的器官，借以攀爬；花中等，花瓣5瓣；果实为蒴果；本科最为人知的成员是盾籽穗叶藤，仅有该种是食肉植物，该种的嫩芽和幼枝可以形成捕捉器官，分泌酸性黏液。本科另外2种：道氏盾籽藤、托伦双钩叶，它们的知名度皆远远不如盾籽穗叶藤。

1981年的克朗奎斯特分类法将其列在堇菜目，1998年根据基因亲缘关系分类的APG分类法认为应该放在石竹目中，2003年经过修订的APG II分类法维持原分类。

The Dioncophyllaceae are a family of flowering plants consisting of three species of lianas native to the rainforests of western Africa.

Their closest relatives are Ancistrocladaceae. Both families lie within a clade of mostly carnivorous plants which, since 1998 or so, have been moved to the order Caryophyllales. This clade also includes the families Droseraceae (sundews and Venus' flytrap) and Nepenthaceae (an Old World genus of pitcher plants), as well as Drosophyllaceae.