The invention discloses a 1074nm and 1112nm dual laser, belonging to the technical field of laser and comprising a pumping source, an optical coupling system, an input lens, a solid laser medium and an output lens which are sequentially arranged. The laser is characterized in that the input lens, the solid laser medium and the output lens obtain simultaneous output of lasers with dual wavelengths of 1074nm and 1112nm through selecting a proper cavity lens membrane system. The dual laser can be applied to fields of material detection, security, medical treatment, communication and the like, can generate 546nm visible green light by using sum frequency of the lasers with wavelengths of 1074nm and 1112nm, and can generate 9.6Thz far infrared radiation by using difference frequency of the lasers with wavelengths of 1074nm and 1112nm.