The invention relates to a wide-frequency-band and high-power single frequency pulse solid-state laser of an LD end pump. In the light path direction, the wide-frequency-band and high-power single frequency pulse solid-state laser comprises a semiconductor diode, an aspheric optical coupling system, a laser crystal and an acousto-optic Q-switch in sequence. The laser crystal and the acousto-optic Q-switch are arranged in a resonant cavity, pump light output by the semiconductor diode can be coupled into the laser crystal through the aspheric optical coupling system to generate laser light, and the laser light can be oscillated through the resonant cavity and modulated through the acousto-optic Q-switch. According to the wide-frequency-band and high-power single frequency pulse solid-state laser of the LD end pump, through reasonable control over the driving electric pulse width of the acousto-optic Q-switch, different effective level widths are set in different driving frequencies; through specific control over a driving source of the acousto-optic Q-switch, the frequency regulation range of the laser is obviously expanded, and the output power of the laser is enhanced.