A　new　type　of　hyperbranched　polyamide　grafted　chitosan　(CS-PAMAM)　adsorbent　was　synthesized　using　glutaraldehyde　(GLA)　as　the　crosslinker.　The　adsorbent　wascharacterized　with　Field　Emission　Scanning　Electron　Microscope　and　Fourier　Transform　Infrared.　Combined　with　flame　atomic　absorption　spectroscopy　(FAAS)　and　UV-Vis　spectrophotometry,　the　adsorption　of　Malachite　green　(MG),　Sunset　yellow　(SY)　and　Cu()　by　adsorbent　were　investigated.　Experimental　conditions　affecting　the　adsorption　percentage　were　discussed　and　the　experimental　operation　parameters　were　optimized　(pH　value　were　7.0,　2.0　and　6.0,　respectively;　adsorption　time　were　60,　60　and　30　min,　respectively).　Under　the　optimal　condition,　the　maximum　adsorption　capacity　of　MG,　SY　and　Cu()　on　CS-PAMAM　was　found　to　be　515.30,　201.79　and　80.00　mg•g-1,　respectively.　The　advantages　are　obvious.　The　adsorption　process　for　MG,　SY　and　Cu()　obeyed　Langmuir　isother　mequation.　©　2018,　Peking　University　Press.　All　right　reserved.