The invention discloses an acousto-optic modulator driving circuit, and belongs to the technical field of acousto-optic modulators. The acousto-optic modulator driving circuit is characterized by comprising direct digital synthesizers, high linearity analogue variable gain amplifiers, radio frequency control switches and a control core chip; the control core chip is connected with communication ends and control ends of the two direct digital synthesizers; output ends of the two direct digital synthesizers are respectively connected with input ends of the two high linearity analogue variable gain amplifiers; output ends of the two high linearity analogue variable gain amplifiers are respectively connected with input ends of the radio frequency control switches; output ends of the radio frequency control switches are connected with input ends of the radio frequency control switches; and the output end of each of the two radio frequency control switches is connected with a power amplifying module. According to the acousto-optic modulator driving circuit, the functions of frequency, amplitude, phase, switch, ramp output and the like of an output signal are controlled through a plurality of means; the frequency output noise is small, moreover, the power is adjustable; the on-off state is controllable; and the use is flexible and convenient.