the spray waterway 11 through the second drain outlet the second state is a state that when the water tank 2 does not drain the check valve 3 is closed so that the spray waterway 11 is separated from the flush waterway 12 in sealing way when the drain valve 21 drains at the first time water enters the spray waterway 11 through the second drain outlet to wash the bottom portion of the toilet body 1 water enters the flush waterway 12 through the first drain outlet 212 to wash the periphery wall of the toilet body the check valve 3 in the flush waterway 12 is open under the work of the water flowing during flushing water fulfills the spray waterway 11 and the flush waterway 12 after the draining as the check valve 3 is closed under the work of the gravity and the negative pressure air can not enter the second drain outlet and the spray waterway 11 the spray waterway 11 is fulfilled or nearly fulfilled when the drain valve 21 drains at the second time water enters the spray waterway 11 through the second drain outlet to wash the bottom portion of the toilet body 1 water enters the flush waterway 12 through the first drain outlet 212 to wash the.