Abstract: Modern marine ranching is a main direction for transformation and upgrading of traditional marine fisheries. It is a hotspot for marine fisheries in China and other countries. The increasing diversification and complexity of proliferation and aquaculture for modern marine ranching led to an urgent innovation in sea use management system. This paper sorts out classification system of proliferation and aquaculture mode, openness degree of sea use, types and mode of sea use for marine ranching based on analysis of modern marine ranching connotation. The modern marine ranching is divided into three Type II (Marine proliferation ranching, marine aquaculture ranching and marine conservation ranching) and thirteen Type III based on their operation mode. The modern marine ranching is divided into three Type II (Open aquaculture, semi-closed aquaculture and closed aquaculture) and nine Type III based on their sea use openness. Based on the classification of sea use and the actual situation of modern marine ranching, this paper proposes sea use new types such as aquaculture sea use, proliferation sea use, conservation sea use, fishing sea use and leisure sea use, etc. And it proposes sea use new modes such as marine cage culture, marine raft culture, bottom sowing culture, marine floating structures, etc. The above marine ranching proliferation and aquaculture modes and sea use classification system can provide references for improving the modern management system of sea use in marine ranching.