The present invention is provided with a temperature limiting adjustable device, which comprises an operation element, a temperature limiting element, a switch element, a position limiting element and a temperature adjusting element; the temperature limiting element is disposed with at least two temperature limiting gears, the operation element controls the switch element to switch between the temperature limiting gears, the switch element is locked to the temperature limiting gear after switching; the switch element is linked to the position limiting element, the position limiting element is disposed with a high temperature end and a low temperature end; the temperature adjusting element is disposed with an abutting element movable between the high temperature end and the low temperature end to abut against the temperature adjusting element for position limit; when the switch element is switched to different temperature limiting gears, the position limit element moves accordingly and makes the position of the high temperature end and the low temperature end change, thus making the temperature adjusting range of the temperature adjusting element change accordingly. The present invention is provided with a temperature limiting adjustable device, the high temperature limiting of the constant temperature shower device is adjustable to suit for different people and different season.