Horizontal grain warehouses constitute the main warehouse type in China's grain storage system.The structural performance of grain inbound and outbound equipment directly affects operating efficiency and grain stor-age stability.Most existing equipment adopts a mobile temporary assembly mode,which suffers from low operating efficiency,high grain breakage rate,serious dust pollution and poor adaptability to new-type warehouses.Focusing on the full-process equipment system for horizontal grain warehouse operations,this paper systematically reviews the research progress on the structural optimization of eight typical types of equipment,which are divided into three cat-egories:general conveying equipment(belt conveyors,pipe chain conveyors),inbound-specific equipment(sam-pling and inspection equipment,cleaning equipment,bucket elevators),and outbound-specific equipment(grain scrapers,screw conveyors,pneumatic grain suction conveyors).On this basis,three common characteristics of current research are summarized:permanent-magnet direct drive for transmission systems,fully enclosed conveying processes,and multiphysics-coupled simulation methods.Meanwhile,critical bottlenecks including insufficient sys-tem coordination,weak adaptability to new-type warehouses and the absence of multi-objective optimization are pointed out.This review can provide a reference framework for the upgrading and development of inbound and out-bound equipment for horizontal grain warehouses.