Abstract: Dilute acid catalyzed hydrolysis of lignocellulosic biomass produces sugars that can be fermented to further produce bioethanol or converted to some other important chemical products. Reactors with different configurations and processes have different hydrolysis kinetics and efficiency. This article gives an overview on the dilute acid hydrolysis kinetics and reactors developed in the past several decades. It can be surmised that a multi-step treatment，a countercurrent process and a dynamic reaction would be the most efficient methods for the dilute acid catalyzed lignocellulosic biomass hydrolysis to produce sugars.