The utility model provides an automatic water screeding device that receives of cement section of jurisdiction arc surface, including portal frame, track roof beam, three -dimensional moving mechanismand receipts water aircraft nose, the track roof beam structure is located on the portal frame, three -dimensional moving mechanism is including connecting crossbeam, horizontal slide rail, mountingbracket and elevating system, the both ends of connecting the crossbeam with the track girder span connects and carries out longitudinal motion along the track roof beam, horizontal slide rail is fixed in to be connected on the crossbeam, the mounting bracket slides with horizontal slide rail and is connected and carries out transverse movement along horizontal slide rail, elevating system slideswith the mounting bracket and is connected in order to follow the vertical elevating movement of carrying on, receive that the water aircraft nose is fixed in elevating system's lower extreme and moveand to receive water floating at cement section of jurisdiction arc surface along with three -dimensional moving mechanism. Through above -mentioned technological means, receive the floating work ofwater with the manual work and turn into machinery to receive water floating, improved the efficiency of construction greatly, simultaneously the utility model discloses simple structure, the preparation material is easy, practices thrift construction cost, has stronger practicality.