The　effects　of　Gd　and　Er　on　ignition-proof　behavior　of　magnesium　alloys　were　investigated.　The　XRD,　SEM　and　EDS　were　used　to　study　the　ignition-proof　performance,　oxide　products　and　oxide　layer　morphology　of　these　alloys.　The　results　indicate　that　the　proper　addition　of　Gd　and　Er　can　increase　the　ignition　point　of　the　magnesium　alloy.　The　better　ignition-proof　property　can　be　obtained　after　the　addition　of　Er　in　the　Mg-Gd　alloy.　The　mechanism　of　ignition-proof　of　magnesium　alloy　containing　Gd　and　Er　are　also　discussed　in　this　work.