在微型机图形处理系统中，可以使用打印机的点位打印功能输出图形。实现过程中需要将屏幕彩色图形转换为二值矩阵，然后进行相应的放大处理，并可以使用适当的整形算法对放大后的图形点阵进行整形；同时，为了缩短矩阵运算时间，降低内存，要对整屏图形进行适当的分割分别处理。文章最后给出了利用Ｃ语言在Ｍ１７２４打印机上实现屏幕图形的放大打印流程。 In the microcomputer graphics system, you can use the printer’s point print function to output graphics. In the process of realization, it is necessary to convert the screen color image into a binary matrix, and then perform the corresponding enlargement processing, and the appropriate shaping algorithm can be used to shape the enlarged graphics lattice. Meanwhile, in order to shorten the matrix operation time and reduce the memory, The entire screen graphics were properly divided for processing. Finally, the paper gives an enlarged print flow of using C language to realize screen graphics on M1724 printer.