Modular building assembly construction floor leveling device

The utility model relates to a floor leveling device for modular building assembly construction. The floor leveling device effectively solves the problems that an ordinary leveling device cannot meetthe requirement for large-area leveling and cannot accurately mark the position needing to be repaired. According to the technical scheme, the device comprises a horizontal guide rod, a sleeve which is arranged below the guide rod and is vertically arranged is arranged on the guide rod; a vertical rod of which the lower end extends out of the sleeve is arranged in the sleeve, the vertical rod canmove up and down in the sleeve, a ball is arranged at the lower end of the vertical rod, a painting brush arranged outside the sleeve is fixed on the vertical rod, a drawing board which is parallel tothe guide rod and is vertically arranged is arranged outside the sleeve, and the drawing board and the painting brush are arranged on the same side of the sleeve; when the sleeve drives the verticalrod and the paintbrush to mo