In　recent　years,　perovskite　solar　cells　(PSCs)　have　become　a　research　focus　in　the　field　of　photovoltaics.　The　efficiency　of　PSCs　has　increased　from　3.8%　(in　2009)　to　24.2%　(in　2019)　in　only　a　few　years,　which　can　be　compared　with　commercialized　thin　film　solar　cells　based　on　Si;　however,　the　instability　of　the　PSCs　hinders　its　wide　application.　The　stability　of　PSCs　mainly　includes　the　stability　of　perovskites　and　other　functional　layer　materials.　This　review　focused　on　the　factors　limiting　the　stability　of　PSCs,　such　as　humidity,　oxygen,　light,　and　heat.　At　the　same　time,　recent　strategies　were　summarized　to　overcome　stability　such　as　perovskite　composition　and　structure　optimization,　interface　modification,　charge　transport　material　improvement,　and　encapsulation.　©　2019,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.