The invention discloses a long-service small-sized electromagnetic relay. The long-service small-sized electromagnetic relay comprises a yoke iron, an armature, an elastic piece, an iron core assembly, a coil frame, a push rod and a base, wherein the iron core in a nesting structure penetrates through an iron core hole of the coil frame and is riveted to a vertical section of the yoke iron, the yoke iron and the armature are steadily combined by virtue of a ''reverse L-shaped'' elastic piece, the coil is electrified to work, the armature is actuated, an armature clamp block and an elastic piece baffle block push the tail of the push rod to drive a movable spring to work, and then a movable contact is in contact with static contact; when the yoke iron and the elastic piece are reset, a limiting rod of the push rod props against an insulation wall of the base, so that the situation that the relay is disabled due to a too-large counter force of the elastic piece is avoided; the coil frameis precisely mounted in the base through a positioning column, and a varnished wire between the coil and a terminal pin is always located on the top surface of a right base plate between two wire clamping bolts, so that the steady wiring is realized. The long-service small-sized electromagnetic relay is compact in structure, stable in performance and good in insulativity, the working failure caused due to over-large actuation voltage can be effectively avoided, the position is precise, and the automatic assembling is easily realized.