According to the debate about misusing hormone in cucumber production，the experiment treated cucumber with different concentration of Megestrol acetate and 5 kinds of hormones. The results showed that there were no changes found in flower and fruit under Megestrol acetate. And 2，4-D delayed the flowering and kept flower blooming. There was faster fruit growth ratio under GA（100 mg·L^-1） treatment. Furthermore，corollas were not completely expanded under NAA treatment. However，there were improvement on fruit setting and fruit expansion under chlorine pyrazole urea and chlorobenzene oxygen ethanoic acid sodium. The effectiveness of suitable hormone concentration on cucumber fruit growth is in following order：chlorine pyrazole urea ＞chlorobenzene oxygen ethanoic acid sodium ＞ 2，4-D ＞ NAA ＞ GA ＞ pure water(the contrast). Among them，chlorine pyrazole urea（10 mg·L^-1）dipping treatment had the best effect on cucumber fruit growth，and its hormone residue detection was in compliance with EU standard（0.01 mg·kg^-1）。