Storage battery cover for flooded lead-acid storage battery

A storage battery cover for a flooded lead-acid storage battery comprises a large cover and an exhaust cover, two sides of the exhaust cover are respectively provided with an air filter piece cavity, two air filter piece mounting holes are arranged in the air filter piece cavities along the width direction of the exhaust cover, the air filter piece mounting hole close to the edge of the exhaust cover is communicated with a labyrinth channel, and the labyrinth channel is communicated with the large cover. An air filtering piece is arranged at the upper part in each air filtering piece mounting hole, the two air filtering pieces are equal in height, the air filtering piece mounting hole which is not communicated with the labyrinth channel is communicated with an exhaust hole, the exhaust hole is provided with a water blocking table, the water blocking table is positioned at an inlet of the exhaust hole, and the lower part of the exhaust hole is blocked by the water blocking table; a deep-cavity acid storage tan