The work aims to prepare the electromagnetic absorbing ink-jet ink with excellent performance, and study the influence of electromagnetic absorbent content on the printability of the ink. The particle size, surface tension, viscosity and light curing speed of electromagnetic absorbing ink were tested when the content of absorbent was different. The influence rule of the content of electromagnetic absorbent on the printability of electromagnetic absorbing in-jet ink was studied, and the most suitable content of electromagnetic absorbent was obtained. When the mass fraction of the absorbent was 0.025%, 0.05% or 0.1%, the particle size (ranging from 200~300 nm) of the ink was in the normal distribution. When the mass fraction of the absorbent was 0.2%, the particle size of most ink was more than 500 nm, which had relatively poor dispersion. With the increase of electromagnetic absorbent's mass fraction, the surface tension and viscosity of the ink showed a downward trend. When the mass fractions of the absorbent were respectively 0.025% and 0.05%, the surface tensions of the ink were respectively 25.76 mN/m and 25.94 mN/m, and the viscosities of the ink were respectively 0.1354 Pa•s and 0.1083 Pa•s, which were close to those of the special resin for ink-jet 3D printer. Moreover, the relative reaction rates of these two kinds of ink during the light curing were quite close to those of the special resin for 3D printer. Based on the comprehensive consideration, the printability and curing rate of the ink are the best when the mass fraction of absorber is 0.05%.