The float type sealing device for water saving full automatic washing machine includes a sealing cover fixed inside the bottom of the outer barrel, a tray fixed in the bottom of the inner barrel, a water draining cavity formed by the outer barrel, the sealing cover and the tray, and a sealing ring to seal the interval between the sealing cover and the tray. It features that the sealing ring is one ring float around the dewatering shaft and capable of being floated upwards along the dewatering shaft to seal the interval between the sealing cover and the tray. The present invention has high sealing effect and relative layer low cost, and is easy to manufacture and install. The present invention solves the problem of friction in a sealing pair and serial problems caused by the friction, such as noise, high power consumption, great dewatering resistance, etc.
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