The invention discloses a tunable blue light and orange light laser. The laser comprises at least two pump light sources, at least one periodically polarized crystal and an optical fiber coupler; thelight input end of the optical fiber coupler is connected with the outgoing ends of the pump light source light paths; the light output end of the optical fiber coupler is connected with the light inlet surface light path of the periodically polarized crystal; and the light output surface of the periodically polarized crystal outputs laser at the wavebands of 480-490nm and/or 589-600nm. By adoption of two kinds of common laser wave bands to be used as the pump light sources to pass through the periodically polarized crystal, the blue light laser and/or the orange light laser can be generated in a tunable manner.