The visual remote sensing monitoring system of tidal flat resources is conductive to their scientific monitoring and protection. However, the current remote sensing monitoring system of tidal flat resources has some problems, such as insufficient correlation of spatial and attribute information, low system reusability and scalability. Combined with the visual display requirements of tidal flat resources, this study optimizes the system. In the aspect of GIS entity management, this paper puts forward the mapping design idea and object-oriented design principle based on GML, which realizes the dynamic management of GIS objects and attributes. In the aspect of layer management, a GIS entity presentation based on MapObject component is proposed to realize the conversion of various vector data and grid data. In the aspect of system design, the plug-in technology is used to realize the encapsulation and reuse of system functions. The dynamic monitoring and visual display of Jiangsu coastal tidal flat resources are well realized, which is of great significance for the protection and the high-quality development of marine tidal flat resources.