The present invention relates to the field of relays, specifically an overcurrent protection relay, including a storage structure, a fixed plate, a filter structure, a limit structure, an on-off structure, a control structure, a reset structure and a heat dissipation structure; the filter structure is in conflict with The on-off structure is convenient to drive the filter structure to vibrate through the on-off structure, and it is convenient to intuitively reflect the on-off situation of the on-off structure according to the deformation of the filter structure, and at the same time effectively prevent dust from entering the filter structure. The interior of the storage box, thereby greatly improving the stability of use, when the push rod touches the filter, the filter has a wave-shaped structure, which increases the dust filtering area and makes the deformation of the filter more Large; the control structure is set inside the on-off structure, thereby improving the heat dissipation performance inside the storage structure, and effectively preventing the on-off structure from being damaged by collision with the control structure, thus greatly improving the stability performance.