▎ 摘　　要

A new acid-base bifunctional catalyst was synthesized by postgrafting of pyridine onto GO. This new catalyst was characterized by different methods such as FT-IR, XRD, TGA, TEM, SEM, EDS, UV-Vis and elemental analysis and employed as a reusable acid-base bifunctional catalyst for the one-pot synthesis of beta-phosphonomalonates via a cascade Knoevenagel-phospha Michael addition reaction of aldehydes, malononitrile and dialkyl phosphites in water.