\twe developed the national design and fabrication standard of bucket elevator “jb3926-1999”. we first develop and apply the steel cord belt bucket elevator in china. our tds model was awarded national mechanical industry science and technology award-highest award of china mechanical industry; the birth of tds model was also ranked year 2001 top10 events by china heavy mechanical industry association. our tds630*86m bucket elevator erected at the silo end in jiangshan huqiu cement plant in 2002 was proved to be highly reliable after 5 year smoot