A system for twodimensional photoacoustic imaging with a continuousstepping scan of a linear motor is reported. The system is in the form of a bowtype curve during motion, in which the linear motor moves continuously in the Xaxis direction, Yaxis direction to have a step by step movement, capture card in the Xaxis motor movement in the process of continuous acquisition. The imaging system is larger than the previous method of scanning the galvanometer, and can reach the biological tissue photoacoustic imaging in the centimeter scale range. Compared with the previous stepping motor, the scanning speed can be improved obviously. At the same time, Driving the light and ultrasonic transducers without moving  the motor can make the sample scanning more flexible.In addition, the use of embedded carbon wire simulation samples and in vivo mouse ear blood vessels to verify the imaging capabilities of the system. The experimental results show that this fast photoelectrical twodimensional microscopic imaging system can be used to achieve highresolution imaging in vivo, and is expected to be a noninvasive, realtime photoacoustic microscope for biomedicine.
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