The invention discloses a confocal unstable resonator Raman laser with seed light. The confocal unstable resonator Raman laser comprises confocal unstable resonators I and II which share a part of light path on the side of a short-focus reflector, and respectively and correspondingly generate pumped wavelength [lambda]1 oscillation and Raman wavelength[lambda]2 oscillation; and a dichroscope is utilized to realize resonance of pumped light and Raman light in respective optical cavities. The two optical cavities are provided with a common focus. A Raman cell is arranged on the common focus and fully receives the pumped light whose wavelength is [lambda]1 to generate the Raman light whose wavelength is [lambda]2. In addition, the working characteristics of the confocal unstable resonators are simultaneously utilized, a scraper mirror is used to send the seed light into the confocal unstable resonator II corresponding to the Raman light, and a lower excited Raman threshold and higher Raman laser output are realized.