Portable unpowered slitting device

The invention relates to the technical field of building slab processing, in particular to a portable unpowered slitting device. The device comprises a mounting bottom plate, a supporting column, a first adjusting shaft, a second adjusting shaft and a blade, wherein the supporting column is fixedly arranged on the upper surface of the mounting bottom plate through bottom bolts. The portable unpowered slitting device comprises the mounting bottom plate, the supporting column, the first adjusting shaft, the second adjusting shaft and the blade, and a longitudinal inner screw hole internally provided with a longitudinal external thread adjusting mechanism is arranged in the supporting column, so that the distance between the first adjusting shaft and the second adjusting shaft can be changedaccording to needs, the height difference of the blade is changed, and the cutting depth of the blade is ensured; and the blade is movably arranged at the right ends of the first adjusting shaft and the second adjusting shaft