The kind of kHz and high-energy pulse laser light source with narrow pulse width has broad prospect in the field of laser ranging. A high-energy, narrow-pulse-width and kHz Q-switching solid laser was designed based on the theory of electro-optical crystal Q-switching and narrow pulse width. A pumping configuration applicable for the high-duty-ratio and high-power LD end face was used in the experiment. The pumping light was focused on the operation material by using the prism coupling system, of which the maximum light conversion rate reached 27%. High-repetition-frequency electro-optical Q-switching effects was made by using RTP crystal and KD*P crystal respectively. With almost the same static input, KD*P crystal Q-switching obtained the dynamic energy output of 11 mJ, while the dynamic energy of RTP crystal was only 5. 64mJ. Under the conditions of optimum pumping power, the dynamic-to-static ratio of KD*P crystal was close to 80%, while the dynamic-to-static ratio of RTP crystal was close to 40%. Finally, by changing the length of the resonant cavity, the feasibility of the short cavity method to achieve the narrow-pulse-width laser output was verified. The narrow-pulse-width laser output of 5. 76ns was obtained for the physical cavity length of 60 mm.