A combination showerhead with push button switching comprises a fixing holder, two showerheads and a switching mechanism. The first showerhead is mounted to the fixing holder; the fixing holder comprises an inlet passage connected to a supporting arm and two diversion passages connected to two showerheads respectively. The switching mechanism comprises a diversion plate, a valve core, a push button and an elastomer. The diversion plate is connected to the fixing holder movably and cooperates with the inlet and diversion passages to switch waterways by rotating a predetermined angle. The valve core is slidably connected to the fixing holder and connected to the diversion plate to drive the diversion plate to rotate by back-and-forth sliding. The push button is movably connected to the fixing holder and connected to the valve core to drive the valve core to slide by a user's pushing.