The invention provides a communication waveband 1.5 micrometer laser wavelength standard generating method which comprises the steps of (1), making laser which is transmitted from a laser diode with a reflection reducing coating penetrate through an RF excited rubidium atom 5P-4D excitation state 1529nm optical filter, thereby performing selection on the frequency of the laser; (2), performing feedback of the laser after selection to the laser diode; and (3), outputting a laser wavelength standard which forms laser at a 5P-4D transition wavelength that corresponds with rubidium atom filtering. According to the method of the invention, the laser diode with the reflection reducing coating, the RF excited rubidium atom 5P-4D excitation state 1529nm optical filter and a laser chamber mirror are used for performing feedback, and a communication waveband 1.5 micrometer laser wavelength standard is realized. The communication waveband 1.5 micrometer laser wavelength standard has long-term stability and high accuracy and is a novel long-term stable 1.5 micrometer laser wavelength standard in the optical communication field.