Lubricating system for roller grinding machine

The invention relates to a lubricating system for a roller grinding machine. The lubricating system comprises a lubricating oil path, a lubricating station and a tile supporting mechanism. The supporting tile mechanism comprises a supporting tile and a mother board, wherein the supporting tile is locked on the mother board, the supporting tile is lubricated by the mother board, and an oil inlet, arhombic oil groove and an oil outlet which are communicated with each other are formed in a mother board body. The rhombic oil groove forms an inner circulation and an outer circulation, and at leasttwo constant-pressure variable pumps in the lubricating station are respectively arranged at the oil inlet and the oil outlet so as to ensure that the pressure of the oil inlet of the mother board isconstant at a preset numerical value. The change of lubricating oil products of a grinding machine and the modification of the lubricating system is completed, the consumption of the lubricating oiland the supporting tile is r