The　erosion　rate　of　cohesive　soils　was　typically　modeled　with　the　excess　shear　stress　model　and　the　Wilson　model.　Several　kinds　of　research　have　been　conducted　to　determine　the　erodibility　parameters　of　the　two　models,　but　few　attempts　have　been　made　hitherto　to　investigate　the　general　trends　and　range　of　the　erodibility　parameter　values　obtained　by　the　commonly　used　Erosion　Function　apparatus.　This　paper　collected　a　database　of　177　erosion　function　apparatus　tests　to　indicate　the　variability　of　all　erodibility　parameters;　the　range　of　erodibility　parameters　is　determined　by　data　statistics　and　parameter　theoretical　value　derivation.　The　critical　shear　stress　(tau(c))　and　erodibility　coefficient　(Z(0))　in　the　over-shear　stress　model　have　a　positive　proportional　relationship　when　the　data　samples　are　sufficient.　However,　there　is　no　such　relationship　between　the　erodibility　coefficient　(b(0))　and　erodibility　coefficient　(b(1))　in　the　Wilson　model.　It　is　necessary　to　express　the　soil　erosion　resistance　by　considering　all　erosion　parameters　in　the　erosion　model.　Equations　relating　erodibility　parameters　to　water　content,　plasticity　index,　and　median　particle　size　were　developed　by　regression　analysis.