A ball float charge limiter for a low-temperature liquid storage tank solves the technical issue that storage tanks are discarded due to unstable structures of ball float charge limiters in the prior art. According to the technical scheme, the ball float charge limiter comprises a liquid feeding pipe, a liquid outlet end of which is arranged inside a liquid storage tank, and liquid spraying holes are provided in the pipe wall at the top of the liquid feeding pipe. The ball float charge limiter is characterized in that a matching slide valve is provided at the top of the liquid feeding pipe; and the slide valve is in slide fit with the liquid feeding pipe along the vertical direction by means of a ball float lever driving mechanism, and forms a mechanism for opening and closing the liquid spraying holes by means of a position limiting mechanism. Through the arrangement of the slide valve, which is driven by the ball float lever driving mechanism, at the liquid outlet end of the liquid feeding pipe, the ball float charge limiter solves the technical problem that the ball float charge limiters in the prior art are unstable in structure, and thus extends the service life of the storage tank.