Objectives:　This　study　assessed　the　effect　of　diet　habits　on　lower　urinary　tract　symptoms　(LUTS)　and　sexual　function　in　Chinese　men　with　LUTS/benign　prostatic　hypertrophy　(LUTS/BPH).　Setting:　Multicentre　study　conducted　between　July　2013　and　December　2013　in　11　hospitals　in　3　geographic　regions　in　China.　Participants:　Overall,　participants　with　LUTS/BPH　accounted　for　61.4%　(2584/4208)　of　the　respondents,　whose　data　were　processed　in　the　following　statistical　analysis.　Primary　and　secondary　outcome　measures:　LUTS　and　sexual　function　were　assessed　based　on　the　International　Prostate　Symptom　Score　(IPSS)　and　the　International　Index　of　Erectile　Function　5　(IIEF-5)　score.　Prostate　volume　(PV)　was　determined　by　ultrasound.　Results:　A　total　of　4208　participants　met　the　inclusion　criteria.　The　average　age　of　the　whole　participants　was　65.8+/-7.7　years.　Overall,　participants　with　LUTS/BPH　accounted　for　61.4%　(2584/4208)　of　the　respondents,　whose　data　were　processed　in　the　following　statistical　analysis.　Generally,　prostate　enlargement　was　greatest　in　south　China.　LUTS　and　male　sexual　dysfunction　(MSD)　were　most　severe　in　northwest　China.　Based　on　multivariable　analysis,　PV　enlarged　as　the　age　(p＜0.001),　body　mass　index　(BMI;　p＜0.001)　and　vegetable　intake　(p＜0.001)　increased.　Age　(p＜0.001)　and　BMI　(p＜0.05)　independently　increased　the　IPSS.　A　higher　level　of　education　(p＜0.001)　and　more　frequent　meat,　fish　and　egg　intake　(p＜0.05)　decreased　the　IPSS.　Age　(p＜0.001),　BMI　(p＜0.001),　low　education　level　(p＜0.05),　vegetable　intake　(p=0.001),　and　milk　and　dairy　product　intake　(p=0.001)　decreased　the　IIEF-5　score.　Conclusions:　In　addition　to　factors　including　age,　obesity　and　level　of　education,　dietary　habits　and　geographic　difference　might　also　play　an　important　role　in　the　variation　of　PV,　LUTS　and　MSD　for　Chinese　men　with　LUTS/BPH.