An electro-optic cavity-dumped 1064 nm solid state laser with short pulse duration and high peak power at 1 kHz repetition rate was proposed. The Nd∶YAG crystal was side-pumped by an 808 nm pulsed laser diode in a folded biconcave cavity. Transverse voltage addition cavity dumping mechanism realized with a synchronously delayed MgO∶LN crystal was used to generate laser pulses. Output pulses with maximum pulse energy and peak power up to 46.7 mJ and 11.5 MW were obtained, corresponding to 200 Hz repetition rate and 4.06 ns pulse duration at 1 064 nm. Peak to peak instabilities of pulse width and pulse energy were ±1.52% and ±2.02%. At the highest repetition rate of 1 kHz, the measured pulse energy, peak power and pulse duration were 18.3 mJ, 3.69 MW and 5.02 ns. Peak to peak instabilities of pulse duration and pulse energy were ±2.75% and ±3.52%, corresponding to the beam quality factors of 3.849 and 3.868, far field divergence angles of 3.46 mrad and 3.55 mrad, and waist spot diamete of 1 508.84 μm and 1 477.30 μm respectively.