Aiming at the problem caused by different design languages used in software design and hardware design,a new hardware and software co-design method based on Python was adopted. Taking the square root algorithm commonly used in digi-tal signal processing and image processing as an example,the fixed-point square root algorithm was implemented on FPGA. The experiment result shows the method based on Python can speedly convert the software algorithm to its hardware design,and im-prove the efficiency of system design,simulation and verify greatly. The product designed by the method can enter its market more quickly than that of the traditional method.%针对当前系统设计中软硬件设计者分别采用不同的设计语言存在的问题，采用基于Python的软硬件协同设计方法，以信号处理和图像处理中常用的平方根算法为例，在FPGA上实现了定点平方根算法。实验结果表明Python可以有效地将软件算法快速地转换为硬件设计，并能大幅度提高系统设计，仿真和校验的效率，使得这种方法设计的产品能更快地进入市场。
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