The experimental results of an active mode-locked Nd∶YVO4 laser end-pumped by a laser diode (LD) are reported. Laser pulses at repetation rate of 320 MHz are gained. The curvature radii of two cavity mirrors are both infinite, the cavity length is 452 mm, and coupling-out mirror transmittance is 3.6%. A high frequency melted quartz acousto-optic modulator (AOM) is used as inner modulator. With the LiNbO4 crystal as energy transducer and driving power of 4.5 W, the diffractive efficiency at 1064 nm wavelength and modulating depth are 5% and 0.31, respectively. The laser average output is 15 mW at optimal mode-locking status (the pumping power is 3.5 W), and pulse width is 680 ps. The measured beam quality factor M2 is less than 1.5. Moreover, this laser pulse train is stable when cavity length deviates no more than ±100 μm.