The invention discloses a visual detection system for precision manufacturing equipment. According to the system, a to-be-detected drill bit is positioned and clamped by a working table, and then an optical imaging module mounted on the working table is regulated to be correctly focused; a laser beam image of the to-be-detected drill bit is acquired by the optical imaging module; the laser beam image generated by the optical imaging module is converted into a digital image signal by an image acquisition card; and contour data of the to-be-detected drill bit is resolved by a computer and a software system, three-dimensional data of surface characteristics of the to-be-detected drill bit is obtained by the contour data, and finally, surface quality and a geometrical shape of a blade face ofthe drill bit are detected. The visual detection system is simple in structure, easy to extract image information and high in measurement accuracy; and compared to a conventional detector, the visualdetection system has the advantages of small man-made interference factor, high repeated positioning accuracy, high automation degree, high efficiency and the like, and meanwhile, also can implement automatic measurement on tool parameters.