The invention belongs to the field of novel multi-functional fertilizer, in particular to multi-functional composition for increasing the production of tuber crops. The active ingredient of the composition is composed of choline chloride, amino-oligosaccharin, diethylaminoethyl hexanoate, naphthylacetic acid, humic acid, potassium sulfate, monopotassium phosphate and magnesium sulfate heptahydrate. The multi-functional composition for increasing the production of tuber crops is novel multi-functional fertilizer, is featured with no residue, no pollution and no resistance in the agriculture and is capable of obviously accelerating the tuber crop root growth and improving the tuberous root and tuber production.