The invention belongs to the control field of power source switches, and provides a single-key switch control circuit and a lamp. The single-key switch control circuit is composed of independent elements, through the combined connection of a switch tube, a not gate, a functional resistor and a capacitor, different high and low electrical level states occur when the switch is pressed down, then a load has different work states, large transient current is avoided, the phenomena of sparking, oxidation, poor contact and the like are avoided, and the reliability of the switch is improved.