The electrohydrodynamic 3D printing technology of electronic additive printing equipment uses electric field force to "pull" and control droplet formation. The size of the generated ink droplets is much smaller than the inner diameter of the nozzle, and the printing precision can reach the submicron level. It has four working modes: on-demand jetting, near-field direct writing, electrospinning, and electrostatic atomization. It can realize low-cost, large-area manufacturing of high-resolution dot matrices, two-dimensional patterns, thin films, and arbitrary three-dimensional structures on various types of flat or curved substrates. The printable materials are compatible with conductive inks, polymer materials, UV-curable materials, etc. (with viscosity ranging from 1cp to 50000cps).