The invention relates to a cutting device, in particular to an equidistant segmented cutting device for building logs. The equidistant segmented cutting device can protect a cutting tool, automatically limit materials and is safe. The equidistant segmented cutting device for building logs comprises a bottom plate, two supports, cutters, a moving mechanism and a pressing mechanism, the two supports are arranged on the bottom plate, the moving mechanism is connected between the two supports, the pressing mechanism is arranged on the moving mechanism, the cutters are arranged on the pressing mechanism, and the cutters are matched with the moving mechanism. According to the equidistant segmented cutting device, the pressing mechanism is arranged, the pressing mechanism operates to press a round log, so that the purpose of automatic pressing is achieved, then the round log can be prevented from moving at will when being cut, safety is achieved, a protection mechanism is arranged, the protection mechanism operates to enable the surface of a cutter to be evenly smeared with lubricating oil, and therefore the effect of protecting a cutting tool is achieved.