The invention relates to the technical field of chip mounters, in particular to a mounting structure of the chip mounter, and discloses a miniature array electromagnet mounting assembly which is assembled by a plurality of mounting heads capable of independently working in rows and arrays. A suction nozzle is moved up and down by the mounting head adopting an electromagnet; the direction positioning of all the suction nozzles of the mounting heads is controlled by a stepper motor; a shell, the lifting of the suction nozzle and a rotation mechanism are kept in a same axial lead; and the suction nozzle is provided with a retractable damping device, thus effectively releasing the impact on a component, and simultaneously compensating the component mounting with unequal thickness. The mounting assembly is neatly integrated, has reasonable structure, simple and direct transmission link, small volume, light weight and effective response speed and facilitates flexible integration.