The utility model discloses a novel trackless easily-disassembled sliding door bottom limiting stopper, which comprises a through screw (2), channel steel (4), an idler wheel (5) and a sliding door (7), wherein the channel steel (4) is provided with a screw hole; the idler wheel (5) and a nut (3) are combined to be installed in the channel steel (4) to use as a limiting device by the through screw (2); the idler wheel (5) extends out of the ground; the limiting device is installed in a reserved bottom groove; the groove position preset on the lower end surface of the sliding door (7) is fixedly provided with a lateral limiting element (6). According to the novel trackless easily-disassembled sliding door bottom limiting stopper disclosed by the utility model, the labor cost and the technical requirement of field operation are lowered by the advantage of backfield machine finished product processing, the stability performance of the sliding door is increased, and the novel trackless easily-disassembled sliding door bottom limiting stopper more conforms to the decoration aesthetic appreciation; the whole device is flexible and convenient to operate, and the field installation requirement can be met.