The invention provides a method for calculating a reservoir physical property upper limit of a continuous type compact fragmental rock oil pool. The method comprises the steps of: calculating the power of secondary migration of oil-gas in a compact reservoir body, a stratum pressure difference between two ends of the oil-gas and the buoyancy of oil-gas migration; calculating the resistance of secondary migration of the oil-gas; establishing a functional relation between the median pressure of a fragmental rock and porosity degree through regression; constructing a power-resistance balanced function, and establishing a functional relation between the porosity degree and each parameter; obtaining a functional relation between the porosity degree at an oil pool depth section and the depth through statistical regression, and converting the median pressure into the functional relation of depths; and acquiring porosity degree values corresponding to different depth values, and drawing a porosity degree upper limit distribution diagram. According to the method for calculating the reservoir physical property upper limit of the continuous type compact fragmental rock oil pool, through stress analysis of the oil-gas and construction of the power-resistance balanced function, the quantitative calculation of the physical property upper limit of continuous oil-gas accumulation is realized, a calculation result is scientific and reasonable.