Abstract: Tidal creeks and vegetation are essential components of salt marsh wetland systems. Exploring the different morphological characteristics formed by the interaction between them during development is helpful to understand the stability mechanism of salt marsh wetland ecosystem. This study took the MentouGang island salt marsh in Liaohe Estuary as the research object. Based on centimeter-level Unmanned Aerial Vehicle(UAV) remote sensing images and GF-2 satellite high-resolution remote sensing images, GIS technology was used to extract 75 tidal creek systems , along with high-precision elevation data and the distribution of salt marsh vegetation. The study involved the calculation and systematic analysis of morphological parameters of tidal creek systems and vegetation fractional vegetation coverage. Relationships between tidal creek development rate and development time, as well as tidal creek curvature, density, and vegetation coverage, were obtained. It was found that the angle between the first and second order tidal creeks, based on the Gravelius classification method, is almost normal distribution, and multiple distribution patterns of Suaeda salsa along the edges of tidal creeks were identified. These findings revealed the development characteristics of tidal creeks and vegetation in different environments. They provide theoretical references for the protection and restoration efforts concerning tidal creeks construction in the Liaohe Estuary salt marsh wetlands.