A high energy optical parametric oscillated (OPO) 2 μm pulsed solid-state laser is demonstrated. The 2 μm laser is generated through a doubly resonant intracavity KTP OPO pumped by an electro-optic (EO) Q-switched Nd:YAG laser. The OPO resonator is composed of a 2 μm high reflection mirror, two walk-off compensated KTP crystals and a 2 μm output mirror. OPO is realized by the typeⅡ phase matching(o→o+e). Both KTP crystals are cut as θ=53°, φ=0°, and have a volume of 8 mm×8 mm×15 mm. When the energy of the diode laser is 1.02 J and the repetition rate of the EO Q-switch is 30 Hz, the highest single pulsed energy of the 2.1 μm laser is 107 mJ, and the conversion efficiency from 808 nm to 2.1 μm is 10.5%. The beam quality M2 factor is M2x=2.38, M2y=1.56, respectively.