The utility model provides an automatic code spraying device of electronic components surface sign, it includes transmission device, the centering device who is used for electronic components centering location is installed to transmission device's both sides plane symmetry, install directly over the centering device and spout the pier, it passes through mounting fixture and installs the top at door -shaped rack to spout the pier, it is connected with the ink jet numbering machine hose on the pier to spout, the sign indicating number pipe is spouted to inside being provided with of ink jet numbering machine hose, the other end that spouts the sign indicating number pipe links to each other with code spraying device, the last optical fiber sensing positioner that installs of centering device. This automatic code spraying device can be used for yard operation of spouting on electronic components surface, and different grade type electronic components's can the fast adaptation not unidimensional through the adjustment yard demand of spouting in addition, and then improved and spout yard quality and spout code efficiency.