Beach-bar sandstone reservoirs are characterized by large longitudinal span，multiple thin layers，poor physical properties and strong heterogeneity. Traditional integral fracturing has poor effect. Step-by-step fracturing costs high with complex operation. Optimization of the separate layer fracturing technology has crucial significance on production. Aimed at the difficulty about low degree of longitudinal stimulation，lacking of effective fracture length and flow conductivity，the beach-bar sandstone reservoirs in Dongying sag were researched. First，in-situ stress profile was determined，concentrated perforation and critical discharge capacity in various layers was optimized. Fracture parameters of the vertical fracturing were optimized. The degree of longitudinal stimulation of long-section and multi-thin-layer reservoir was improved using separate layer fracturing. Second，the effective placement of proppant was realized and the degree of layer stimulation was improved by optimizing the fracture parameters，operation parameters，proppant and low-damage fracturing fluid system.The application result of separate layer fracturing in Bin 438 well block show that the average oil production after three months of the separate layer fracturing is 2.2 times of that of the integral fracturing in adjacent wells，which demonstratesthe effectiveness of this method.