The invention discloses a single-chip microcomputer switching control circuit. The circuit comprises a resistor R1, a LED, a button switch SB, a capacitor C1, a diode D1 and a triode VT1; one end of the resistor R1 is connected with a power source VCC and the emitter of a triode VT2; the base of the triode VT2 is connected with the resistor R1 and a resistor R2; one end of the resistor R2 is connected with the anode of the LED and the button switch SB; the cathode of the LED is connected with the collector of a triode VT3; the base of the triode VT3 is connected with a resistor R4; and one endof the resistor R4 is connected with a resistor R3, the capacitor C1 and the IO2 port of a single-chip microcomputer. According to the single-chip microcomputer switching control circuit of the invention, the button switch SB is matched with a plurality of triodes, so that a control component for the powering on and powering off of the single-chip microcomputer can be formed. The structure of thesingle-chip microcomputer switching control circuit is very simple. The single-chip microcomputer switching control circuit can effectively control the power source of the single-chip microcomputer and realize zero-power consumption standby.