▎ 摘　　要

NOVELTY - Preparing monatomic solid base catalyst comprises weighing an alkali precursor, dissolving the alkali precursor in a solvent, adding a carrier material in a stirring state, uniformly stirring at room temperature, evaporating in a water bath, and then drying in an oven to obtain a pretreated sample. The pretreated sample is roasted and activated in an inert gas atmosphere to convert an alkali precursor into an alkaline site to obtain monatomic solid alkali catalyst. The alkali precursor and the carrier material are provided in a mass ratio of 0.02-0.15:1. USE - Method for preparing monatomic solid base catalyst used in transesterification, Knoevenagel and Michael addition reactions (claimed). ADVANTAGE - The method for preparing monatomic solid base catalyst in a simple, cost-effective and eco-friendly manner with highly dispersed and loss-resistant alkaline sites, reduced loss of active sites and prolonged service life.