The invention discloses a button-switching water outlet device and a shower head. The button-switching water outlet device comprises a water outlet unit and a switching mechanism. The water outlet unit has at least two water outlet functions or at least two water outlet modes. The switching mechanism comprises a button, a shifting component, a rotary disc, a water distribution component and a connecting rod. The button pushes the rotary disc to rotate through the shifting component. The water distribution component rotates relative to the water outlet unit so that the water outlet functions or the water outlet modes can be switched. The connecting rod and the water distribution mechanism are connected in a synchronous rotation mode, and the connecting rod and the rotary disc can be a synchronous rotation state and a separated state. When the connecting rod and the rotary disc are in the first state, the rotary disc drives the water distribution mechanism to rotate through the connecting rod. When the connecting rod and the rotary disc are in the second state, the water distribution mechanism is restored to be in the initial state, and the connecting rod is restored to be in the first state. The shower head is provided with the water outlet device. By the adoption of the structure, the water distribution mechanism can be restored to be in the initial state without rotating by a round, and a wider application space is achieved.