The invention relates to a soil-phase-free oil-based drilling fluid. The soil-phase-free oil-based drilling fluid is prepared from the following raw materials in percentage by weight: 50-85 percent of base oil, 5-30 percent of CaCl2 saline, 1-4 percent of composite type emulsifier G326-HEM, 1-5 percent of filtrate reducer G328, 0.5-3 percent of alkalinity conditioning agent, 0.5-3 percent of tackifier, 0.2-2 percent of viscosifier and the balance of barite. According to the soil-phase-free oil-based drilling fluid, the demulsification voltage is higher than 800V, and the temperature resistance of higher than 180 DEG C is achieved; the formula is simple, the field operation and maintenance are convenient, and the soil-phase-free oil-based drilling fluid has good rheological property in the absence of a wetting agent under the condition of high density; the system is widely applicable to the base oil and can be used in mineral oil or gaseous oil; and a novel method is provided for lowering the well leakage loss of the oil-based drilling fluid, the cost of the drilling fluid is also remarkably lowered, good economic and social benefits are obtained, and thus the soil-phase-free oil-based drilling fluid is worthy of popularization and application.