A fast photoacoustic imaging system based on multi-channel parallel acquisition, which is composed of ultrasonic detector, multi-channel parallel acquisition system, short-pulse laser, computer hardware platform and a pack of software for the control of the data acquisition and real-time imaging, is designed. Multi-channel parallel acquisition system consists of front-end analog amplifier, anti-aliasing filter, A/D converter, data storage, field programmable gate array (FPGA) control and universal serial bus (USB) transfer and it has 64-channel full parallel acquisition and digital processing. The results of imitative sample show that multiple locations of rotating scan imaging improve the signal to noise ratio (SNR) greatly. Consequently, it is characterized by fast imaging and is expected to be a noninvasive real-time tissue imaging system with high repetition frequency laser as excitation and provide a new method for clinical noninvasive detection.