With　the　application　fields　continuously　extending,　the　embedded　systems＇　security　issues　become　increasingly　acute.　Introducing　trusted　computing　technology　into　the　embedded　system　is　a　promising　solution.　In　this　paper,　based　on　Nios　II　soft-core　embedded　platform,　the　integrity　measuring　scheme　implemented　with　the　help　of　FPGA,　can　measure　the　bootloader　and　operating　system　image　to　realize　trusted　booting.　The　measuring　scheme　doesn＇t　have　the　hardware　changed,　and　the　only　need　is　to　modify　the　FPGA　configuration　file.　Involving　the　integrity　measuring　scheme　is　helpful　to　the　embedded　systems＇　security　issues.