The fracturability of reservoirs is an essential parameter for selecting perforation stages and predicting hydraulic fracturing effects， but fracturability evaluation for tight sandstone reservoirs lacks unified methods and standards. This paper studies Chang 6 tight sandstone reservoir in an oilfield in the southeastern part of Ordos Basin and optimizes the characterization model of rock mechanics parameters based on the conventional logging data. The paper analyzes the relationships among reservoir rock brittleness，fracture toughness， in-situ stress difference coefficient， and daily fluid production， establishes the fracturability evaluation model and evaluation standard for tight sandstone reservoirs， and obtains fracture quality factor curves corresponding to logging curves. As a result， a high-precision logging evaluation method for the fracturability of tight sandstone reservoirs was developed. The results indicate as follows： ① The brittleness index is positively correlated with the fracturability， and the fracture toughness and in-situ stress difference coefficient are negatively correlated with the fracturability. ② The fracturing quality factor is greater than 25 for Class I reservoirs， indicating the best fracturability； it is easy to form a complex fracture network during fracturing and belongs to high-quality tight sandstone reservoirs. The fracturing quality factor ranges from 14 to 25 for Class II reservoirs， indicating medium fracturability； it is necessary to use fracturing fluid with low viscosity or keep high net pressure in fractures to form a better fracture network. The fracturing quality factor is less than 14 for class III reservoirs， indicating poor fracturability； an ideal fracture network is usually not formed during fracturing， and fractures are easy to close after fracturing. ③ Higher fracturing quality factors of tight sandstone reservoirs indicate better characteristics of artificial fracture morphologies and higher production capacity after fracturing.The evaluation results by the established model are more than 80% consistent with the microseismic fracture monitoring results and production testing results.