The invention discloses an illuminating-adjustable controller with high sensitivity. The illuminating-adjustable controller comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a first diode, a second diode, a third diode, a fourth diode, a special touchable light adjusting chip, a touch piece, a thyristor and a lamp tube. For the adjustable illuminating controller disclosed by the invention, through the repeated touch to the touch piece, the luminous intensity of the lamp tube can be controlled, the adjustable illuminating controller has the advantages of being higher in sensitivity, simple in integral structure, lower in use cost, convenient to use, low in static power consumption and reliable in operation, and the adjustable illuminating controller has a higher popularization and promotion value.