A water-flow-adjustable water-saving bubbler comprises: a housing (9) and a bubbling device mounted in the housing (9) and further comprises: a switching shaft (6) and a water diversion body (2) disposed above the bubbling device. The switching shaft (6) is inserted in a shaft hole (44, 73, 83, 93). A first water passage is formed between the switching shaft (6) and the wall of the shaft hole. A plurality of through holes (11, 43, 92) is provided at the periphery of the shaft hole (44, 73, 83, 93) to form a second water passage. The switching shaft (6) is moveable between an initial position and a second position. In the initial position, a sealing component of the switching shaft (6) blocks the first water passage and water flows out only from the second water passage. In the second position, the sealing component of the switching shaft (6) is separated from the bubbling device, the first water passage is opened and remains in the open state under water pressure, and water flows out from both the first and second water passages.
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