Abstract: Plant lectin is a sort of plant protein, which can be used to control pests. It is very safe to animal, environment, and very stable in many facets. In this paper, crude lectins of Alocasia odora lectin (AOL) were obtained from Alocasia odora (Roxb) C. Koch. Then obtained chromatographic purified AOL by fraction. It was identified that AOL had strong anti-aphid action, including most stomach toxic, quite reproductive inhibition and honeydew secretion inhibition.