The invention discloses an explosion-proof portable energy storage power supply which comprises a bottom frame and further comprises a battery box installed on the bottom frame, a storage battery is installed at the inner bottom of the battery box, a connecting box extending out of the battery box is installed at the inner top of the battery box, and a connecting core is installed on the inner wall of the connecting box. One end of the connecting core extends into the battery box and is electrically connected with the storage battery through a wire, a sliding plate is slidably mounted on the inner wall of the connecting box, a socket is mounted on the outer wall, away from the connecting core, of the sliding plate, and a contact core electrically connected with the socket is mounted on the outer wall, close to the connecting core, of the sliding plate. Through cooperation of the structures, when a fault occurs to cause short circuit, the connecting core is separated from the contact core, so that the effect of cutting off power at the first time is achieved, fire caused by short circuit is prevented, the explosion-proof effect is achieved to a certain extent, and meanwhile, the safety performance during use is also improved.