The invention discloses a self-reflection photoelectric tube anti-interference circuit, relates to the field of circuit design, and solves the anti-interference problem and the service life problem ofa transmitting photoelectric tube and a receiving photoelectric tube. The circuit comprises an operation comparator, a universal phase-locked loop circuit tone decoder, an NPN type triode, first to ninth resistors, an external connector, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a transmitting photoelectric tube, a receiving photoelectric tube and a state display LED lamp. According to the invention, a frequency synthesis and decoding circuit composed of a general phase-locked loop circuit tone decoder and related components is adopted; meanwhile, an operational amplification circuit composed of an operational comparator and related components is adopted, the two circuits are adopted for supplying power to the photoelectric tube, the service life of thephotoelectric tube can be greatly prolonged, the aging speed of the photoelectric tube is increased, and meanwhile the anti-interference effect is achieved; Meanwhile, the circuit receiving end adopts a decoding receiving mode, so that the reliability of the receiving circuit is ensured, and external interference is avoided.