The invention provides a device and a method for generating a photo-communication waveband continuous variable quantum entanglement source. The device comprises a photo-communication waveband continuous single-frequency fiber laser, a frequency multiplier, a signal light mode cleaner, a pump light mode cleaner, a dichroic mirror, a total reflection plane mirror with piezoelectric ceramics, a three-resonance non-degeneracy optical parametric amplifier, a crystal temperature controller, a cavity length and phase locking system, a first 45-degree high reflecting plane mirror and a quantum entanglement source detection system. According to the device and the method for generating the continuous variable quantum entanglement source, the device has a compact structure, is high in stability and is matched with the photo-communication waveband; the device adopts a single three-resonance non-degeneracy optical parametric amplifier for directly preparing the photo-communication waveband continuous variable quantum entanglement source, and the transmission loss of the waveband quantum entanglement source in optical fiber is only 0.2dB / km, so that the high fidelity transmission of information is realized; and the device is compatible with the present photo-communication system, so that the quantum entanglement source can become a perfect light source of a practical quantum network.