The principle of the touch type lamp is to form a control loop by internally mounting the electronic touch IC and the electrode piece at the touch of the desk lamp. When the human body touches the sensing electrode piece, the touch signal is transmitted to the touch sensing end by the pulsed direct current, and then the touch sensing end sends a trigger pulse signal to control the light to be turned on; if touched again, the touch signal is touched. A pulse signal is generated by the pulsating direct current to be transmitted to the touch sensing terminal, and the touch sensing terminal stops emitting the trigger pulse signal. When the alternating current crosses zero, the light naturally goes out. However, sometimes it may be self-illuminating after a power failure or when the voltage is unstable. If the sensitivity of the touch signal is excellent, the paper or cloth can be controlled.