Phosphate　rock　powder　(PR)　has　been　shown　to　possess　the　potential　to　stabilize　lead　(Pb)　in　soil.　Most　of　the　phosphorus　(P)　minerals　in　the　world　are　low-grade　ores,　making　it　difficult　to　achieve　the　expected　stabilization　effect　on　heavy　metals.　This　study　compared　the　changes　in　the　phase　composition　and　structure　of　PR　and　three　kinds　of　activated　phosphate　rock　powder　(APR)　(organic　acid-activated　PR,　thermal-activated　PR,　and　thermal-organic　acid-activated　PR).　The　stabilization　effectiveness　of　APR　on　Pb-contaminated　soil　was　evaluated　by　toxicity　leaching　procedure;　the　Pb　products　adsorbed　on　APR　and　stabilization　mechanism　of　APR　on　Pb　were　analyzed.　The　results　demonstrated　that　APR　showed　decreased　crystallinity　and　3.4-fold　increase　in　specific　surface　area,　and　a　53.07%　and　49.32%　increase　in　soluble　P　content　in　oxalic　acid-activated　PR　and　citric　acid-activated　PR,　respectively,　when　compared　with　those　of　PR.　These　changes　improved　the　stabilization　effect　of　APR　on　Pb-contaminated　soil,　in　which　oxalic　acid-600　degrees　C-activated　PR　showed　the　best　effect,　presenting　94.0-99.8%　reduction　in　Pb　leaching　concentration　following　addition　of　2-10%　modifier.　Product　characterization　after　Pb　adsorption　on　APR　showed　that　Pb　was　adsorbed　onto　APR　by　forming　fluoropyromophite　precipitation　with　APR.