Considering the wide distribution of bedding fractures in tight sandstone reservoir，it is of great significance to further study the hydraulic fracturing of tight sandstone reservoir by investigating the effect of imbibition displacement of bedding fractures. The tight sandstone reservoir of Lucaogou formation in Jimsar Depression is selected as the research object，and the static imbibition experiments and dynamic simulation experiments at high temperature and high pressure are carried out to compare the imbibition displacement performance between the bedding fractures and structural fractures，and explore the reason caused the difference of imbibition performance. The main controlling factors for imbibition displacement of bedding fractures are determined. Results show that average imbibition efficiency of structural fractures and bed? ding fractures are about 26% and 20% at room temperature. That is to say the imbibition efficiency of the bedding fractures is 77% of that of the structural fractures. The imbibition performance of bedding fractures on improving oil recovery is better. Under normal temperature and pressure or formation temperature and pressure，the imbibition process can be divided into an extremely fast reaction stage，a fast reaction stage，and a slow-stop stage. As the formation temperature rises，the difference of imbibition efficiency between bedding fractures and structural fractures decreases slightly，and the imbibition efficiency of the bedding fractures is 93.4% of that of the structural fractures. When the structural fractures and bedding fractures with the same area are opened together，the imbibition efficiency is basically unchanged，but the imbibition time is greatly reduced.Due to the difference of pore structure in vertical and horizontal direction between bedding fractures and structural fractures，the imbibition efficiency of them is different.