The utility model discloses an electric fan safety cover convenient to installation, including inner cover and dustcoat, the inner cover is annular sheetmetal structure with the edge of dustcoat, thelateral surface embedding of inner cover sheetmetal is equipped with the breach of a plurality of concave types, the lateral wall of this breach and the rear end integrated into one piece of cardboard, it is equipped with a plurality ofly and breach complex connecting rod to fix on the dustcoat sheetmetal, the utility model discloses the structure is when the installation dustcoat, it inserts to aim at the breach with the grip block of dustcoat, make the dustcoat align with the inner cover, it makes the cardboard card go into to the grip block in to rotate the dustcoat, go on tentatively fixedly to the dustcoat, after the preliminary fixed good dustcoat, it inserts to aim at the jack with fixing device's inserted bar, the inserted bar is at the male in -process, fixture block lapse in J type draw -in groove, at last, the wrench movement dish rotates, the head of inserted bar rotates, the card is at the tail end of jack, the fixture block is then block into the hook portion to J type draw -in groove, fix turning to of inserted bar.