Changzuiornis is an extinct genus of ornithuromorph bird from the Early Cretaceous of present-day China.

In 2016 the type species Changzuiornis ahgmi was named and described by Huang Jiandong, Wang Xia, Hu Yuanchao, Liu Jia, Jennifer A. Peteya and Julia A. Clarke.

The generic name combines the Chinese chángzuì, "the longest", a reference to the long beak, with a Greek ὄρνις, ornis, "bird".

The specific name is the Latin genitive of the acronym AHGM, the Anhui Geological Museum.

The describers suggested that Changzuiornis might be cogeneric to the closely related Juehuaornis found in the same formation, in which case the latter genus would have priority.