The application discloses floor levelling device and floor levelling car includes: leveling mechanism, supporting mechanism and coupling mechanism, leveling mechanism for the level and smooth board that is equipped with the multiunit scraper blade, levels the board, and for the rectangular frame structure, the frame comprises crossbeam and longeron, the scraper blade, by the crisscross crossbeam lower end of locating level and smooth board of an adapting unit, the scraper blade is equipped with the level and smooth end that is used for the ground grading, level the end with personally submit certain inclination, the supporting mechanism is arranged in the another party of level and smooth board for the scraper blade for support leveling mechanism, its both ends respectively with leveling mechanism and coupling mechanism fixed connection, a 2nd adapting unit of multiunit is provided on the coupling mechanism is located the crossbeam side of level and smooth board, its for carry out detachable the connection with external device. The utility model discloses following effect has been reached: (1 ) simple structure, it is convenient to maintain, (2 )Improve the effect level and smooth and rotary tillage, (3 )Safeguard ground and brick face.