The utility model provides a distance measurement type automatic foaming deodorization and sterilization water-saving toilet, which is characterized by comprising a toilet basin, a distance measurement head, a single-chip microcomputer, a foaming driving plate and a foaming pump, wherein the distance measurement head is arranged right opposite to a position where foams appear in front of the toilet basin, and is arranged on one side of the toilet basin; the horizontal foam measurement range of the distance measurement head is from 100mm to 1,200mm, and the perpendicular mounting range of the distance measurement head is from a position maximally 100mm higher than the surface of the toilet basin to a position maximally 500mm lower than the surface of the toilet basin; the distance measurement head is used for judging whether the foams appear in a certain size range above the toilet basin or not, and judging whether corresponding voltage signals are generated or not according to a range where the foams appear; the single-chip microcomputer is used for transmitting a signal to the foaming driving plate to control the foaming pump to start or stop working.