An embodiment of the invention discloses a kind of electrophoretic ink comprising an electrophoretic display solution which is an electrorheological fluid comprising a base solution, solid particles and an additive, wherein the solid particles account for 5%-50% of the electrorheological fluid by mass-volume percentage. The electrophoretic display solution is preferably a negative electrorheological fluid. The invention also discloses an electronic paper comprising the electrophoretic ink and a display method for the electronic paper.