Exploration practices in recent years show that steep slope belts on terrestrial fault\|depressed basins in China feature many favorable reservoir forming factors such as versatile sandbody types, multiple oil or gas bearing layers and rich reservoir of high productivity. Due to factors like intense tectonic movements, steep slope topography, sediments near source rock and rapid change of facies, usually sedimentary facies and their distribution on steep slope belts are even harder to describe than the other basin units. By utilizing comprehensive information and data on drilling, core, logging, seismic and various analytic testing results in this article, several sedimentary facies such as nearshore submarine fan, fan delta, fluvial delta, deep water turbidities fan on steep slope, moved slope turbidities fan, all of which are closely related to oil and gas exploration, are identified at the Sha 4 and 3 member, Minfeng area of Dongying Depression. Combining with paleostructure, paleoclimate and datum plane cycle in this area, the article analyzes the key sedimentary facies evolution and distribution features of Sha 4 and 3 member, offering applicable instructions for oil and gas exploration in similar geological areas.