In May 2018, during field collecting work in the Jindian Forest Park, Kunming, Yunnan Province, we found a massive infestation of adults and immatures of a psyllid species on young Eucalyptus globulus trees. This psyllid was identified as Ctenarytaina eucalypti (Maskell, 1890), a species originating from Australia. This species has been introduced to Europe, Africa, USA and South America, but ours is the first record of C. eucalypti in China, making it the third invasive psyllid in this country. Diagnosis of C. eucalypti is provided herein.