To　verify　the　positioning　performance　and　reliability　of　multi-system　combination　Precise　Point　Positioning　in　landslide　monitoring,　we　carried　out　a　multi-system　combination　Precise　Point　Positioning　calculation　experiment　on　the　monitoring　data　of　a　single　landslide　disaster　area　in　Fujian　Province.　The　coordinates　of　the　monitoring　points　obtained　by　a　continuously　operating　reference　station　and　the　monitoring　station　for　static　relative　positioning　were　used　as　reference　values.　The　GPS　system　was　used　as　the　standard　system　and　the　combined　PPP　solution　mode　of　G/R/C,　G/R/E　and　G/R/E/C　was　used　to　obtain　the　surface　displacement　of　the　landslide　area.　The　research　showed　that　multi-system　combination　PPP　converges　to　the　centimeter　level　in　about　30　min.　The　average　value　of　internal　accordant　precision　was　more　than　1　mm　after　convergence,　and　that　of　the　external　accordant　precision　was　more　than　5　cm,　which　meets　the　centimeter-level　accuracy　requirements　in　rapid　landslide　deformation　monitoring.