The invention relates to a step slope inter-exchange passage, which consists of a slant sub-base, rails, an angular terrace surface, a power rod, a motor and a reducer, wherein the angular terrace surface is hinged with the slant sub-base, is movably connected with the rails and is connected with a power rod gear, and the motor drives the power rod to rotate through the reducer, so a longitudinal gear drives a turnover gear to rotate so as to transform the step passage or the slope passage. Only one slant sub-base is required to be arranged between two working surfaces with fall, and the step passage is transformed to the slope passage through a control switch so as to be convenient to push and pull different trolleys. Therefore, the step slope inter-exchange passage has simple and reasonable structure and convenient operation, can save the field space, and can reduce the expense.