催化重整（英语：Catalytic reforming）是将从原油中蒸馏的炼油厂石脑油（辛烷值通常较低）转换为高辛烷值的重整油（是高辛烷值汽油的增值调和料）的一种化学过程。该过程将低辛烷值的直链烃转为带支链的链烷（异构烷烃）和环烷烃，部分脱氢生成高辛烷值的芳烃。脱氢过程还生产大量的副产物氢气，可供给其他炼油过程，如加氢裂化。副反应是加氢裂化反应，生成低分子量的烃，如甲烷、乙烷、丙烷、丁烷。

除了作为汽油调和料，重整还是芳烃大宗化学品如苯、甲苯、二甲苯和乙苯的主要来源，它们具有各种用途，最重要的是作为塑胶的转换原料。然而，重整油中的苯是致癌的，政府法规要求后续必须有效减低苯含量。

Catalytic reforming is a chemical process used to convert petroleum refinery naphthas distilled from crude oil (typically having low octane ratings) into high-octane liquid products called reformates, which are premium blending stocks for high-octane gasoline. The process converts low-octane linear hydrocarbons (paraffins) into branched alkanes (isoparaffins) and cyclic naphthenes, which are then partially dehydrogenated to produce high-octane aromatic hydrocarbons. The dehydrogenation also produces significant amounts of byproduct hydrogen gas, which is fed into other refinery processes such as hydrocracking. A side reaction is hydrogenolysis, which produces light hydrocarbons of lower value, such as methane, ethane, propane and butanes.