In response to the complex terrain environment，large construction area，and multiple disciplines involved in the dock project，there are issues such as inaccurate terrain data，low efficiency of construction collaborative management，and inability to transmit project data.This paper focuses on BIM+GIS data fusion，fusion data processing and application，and conducts secondary development based on domestic GIS platforms to achieve model lightweight，model data coding，and one click web service publishing etc. ,to achieve digital business management driven by fusion data，and form a set of BIM+GIS integrated data application solutions for terminal engineering.This article takes a certain dock project as an example to conduct digital application verification of research results in the design and construction stages of dock construction，which improves the digital management level of dock projects，and also provides a way of thinking for the full life cycle management of dock projects.