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 (D1), 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 (D1), 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 (D1), 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 (D1), 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 . <EOS>