The invention provides a high-repetition frequency blue violet laser, relates to the technical field of novel lasers, and solves the problems that an existing solid laser is low in laser output power and laser optical quality. The blue violet laser comprises a laser diode (LD) pumping source, a transmission optical fiber, a coupling lens assembly, an alkali metal vapor pond, a resonant cavity, an acousto-optic Q-switch, a convex lens, a first reflector, a second reflector and a frequency doubling crystal. The LD pumping source emits pump light, the transmission optical fiber conveys the pump light into the coupling lens assembly for coupling focus, then the pump light enters the alkali metal vapor pond, alkali metal atoms can carry out effectively population inversion, and then pulse fundamental frequency light can be generated through modulation of the acousto-optic Q-switch and feedback effect of the resonant cavity. The pulse fundamental frequency light is output through an output mirror, focused by the convex lens and then reflected by the first reflector to enter the frequency doubling crystal, the pulse fundamental frequency light is partially conversed into blue violet frequency doubling light, and then the blue violet frequency doubling light is reflected by the second reflector, enters the frequency doubling crystal and is output through the first reflector. The high-repetition frequency blue violet laser is high in laser output power and laser optical quality.