The invention discloses a water quantity adjustable type water falling device. The water quantity adjustable type water falling device comprises a water leaking disk, a speed regulating disk, a hose,a water guide pipe, a main pipeline, a sealing sleeve, a spring sleeve, a third sleeve, a second sleeve and a first sleeve; the speed regulating disk is mounted in a groove in the water leaking disk;the water leaking disk is communicated with the water guide pipe through the hose; the tail end of the water guide pipe is communicated with the main pipeline; the spring sleeve is mounted at the bottom of the sealing sleeve; the third sleeve, the second sleeve and the first sleeve are connected to and mounted at the top end of the spring sleeve from bottom to top in a sleeving manner. The devicedesign is suitable for mounting of kitchen sinks, the water leaking disk can realize that water can flow out, a leaking net is arranged in the water leaking disk, impurities can be filtered, blockingsheet design of the speed regulating disk can block the water quantity of a water outlet of the water leaking disk, and the flowing speed can be adjusted; when water exists in the basin, the self weight of water presses down the water leaking disk, the journey of the three sleeves is shortened, the water leaking disk falls off, the water speed is increased; when the water quantity is reduced, thejourney of the three sleeves is lengthened, the water falling device is blocked.