Tight oil reservoirs require higher fracture conductivity compared to the tight gas reservoirs，and shale content is usually higher in the tight oil reservoirs resulting in serious embedment of fracturing proppant in rock. Conventional proppant embedment tests do not consider the influence of rock mineral composition，mechanical properties and fracturing fluids，which leads to the incorrect understand of the impact of proppant embedment on the conductivity and great difficulty of optimization on sand concentration and proppant selection. Mineral composition and mechanical parameters of the rock in tight oil reservoirs were analyzed. Self-developed measuring instrument of embedment and conductivity was applied to embedment test using cores soaked with various liquids and non-soaked ones. The results of experimental data show that the embedded depth of the proppant increases with the closure pressure and the proppant diameter and decreases with the sand concentration increasing. The embedded depth is relatively small when the brittle mineral content is relatively high and the clay content is relatively low. The embedded depth in soaked core is larger than that in the original core. The cores soaked with KCl can obtain a smaller embedded depth than the cores soaked with fresh water. The research concludes that the damage of the proppant embedment on the conductivity can be reduced by strengthening anti-swelling capacity of fracturing fluid and applying proppant with diameter as large as possible.