The invention discloses a laser radar and an optical fiber laser thereof. The optical fiber laser comprises a first shell, a second shell, at least one active optical device and at least one passive optical device, wherein the first shell covers the second shell, the at least one passive optical device is arranged in the first shell, and the at least one active optical device is arranged in the second shell; the bottom of the first shell is provided with an arc-shaped first fiber guiding groove penetrating through the bottom, and the arc-shaped first fiber guiding groove is used for guiding anoptical fiber connected with the at least one passive optical device in the first shell into the second shell or guiding an optical fiber connected with the at least one active optical device in thesecond shell into the first shell. According to the optical fiber laser, the size is reduced by adopting a multi-layer design, and the optical fiber is guided by adopting the arc-shaped fiber guidinggroove, so that the damage to the optical fiber in the using process is reduced, and the stability of the device is improved.