An electromagnetic relay for preventing arc short circuit, comprising: a base provided with a first accommodating cavity, wherein the first accommodating cavity is provided with a plurality of partition plates to divide the first accommodating cavity into a plurality of compartments distributed along a preset direction, a side of the first accommodating cavity is provided with a first opening leading to each of the compartments; a magnetic circuit part installed on the base and comprising an armature; a contact part comprising a plurality of contact units corresponding to the plurality of compartments one-to-one, wherein each of the plurality of contact units comprises a movable spring part and a stationary spring part, and the movable spring part and the stationary spring part are installed in a corresponding compartment and configured to cooperate with each other; an actuator, wherein the armature of the magnetic circuit part are cooperated with the movable spring part of each of the contact units by the actuator; a first arc partition plate configured to close all or part of the first opening, wherein an inner side of the first arc partition plate is provided with a plurality of first baffles distributed along the preset direction, at least one first baffle is laterally inserted into each compartment, and the first baffle is configured to adjacent to or abut against a partition plate of the compartment to form at least two partition walls located between adjacent compartments, characterised by comprising: a case with an opening at a bottom, wherein the case is connected with the base, and is configured to accommodate the magnetic circuit part, the contact part, the actuator and the first arc partition plate in a casing cavity of the case. a base provided with a first accommodating cavity, wherein the first accommodating cavity is provided with a plurality of partition plates to divide the first accommodating cavity into a plurality of compartments distributed along a preset direction, a side of the first accommodating cavity is provided with a first opening leading to each of the compartments; a magnetic circuit part installed on the base and comprising an armature; a contact part comprising a plurality of contact units corresponding to the plurality of compartments one-to-one, wherein each of the plurality of contact units comprises a movable spring part and a stationary spring part, and the movable spring part and the stationary spring part are installed in a corresponding compartment and configured to cooperate with each other; an actuator, wherein the armature of the magnetic circuit part are cooperated with the movable spring part of each of the contact units by the actuator; a first arc partition plate configured to close all or part of the first opening, wherein an inner side of the first arc partition plate is provided with a plurality of first baffles distributed along the preset direction, at least one first baffle is laterally inserted into each compartment, and the first baffle is configured to adjacent to or abut against a partition plate of the compartment to form at least two partition walls located between adjacent compartments, characterised by comprising: a case with an opening at a bottom, wherein the case is connected with the base, and is configured to accommodate the magnetic circuit part, the contact part, the actuator and the first arc partition plate in a casing cavity of the case.