Abstract: The invention relates to a method for producing alkoxy-substituted 1,2-bissilylethanes of the general formula 1 (R1O)nR2(3-n)Si—CH2—CH2—SiR2(3-n)(OR1)n??(1), which comprises reacting, in a first step, a mixture containing compounds of the general formulae 2 and 3 ClnR2(3-n)Si—CH2—CH2—SiR2(3-n)Cln??(2) ClnR2(3-n)Si—CH?CH—SiR2(3-n)Cln??(3) with an alcohol of the general formula 4 R1OH??(4) and, in a second step, subjecting the resultant mixture which contains compounds of the general formula 1 and compounds of the general formula 5 (R1O)nR2(3-n)Si—CH?CH—SiR2(3-n)(OR1)n??(5) to reductive conditions such that the compound of the general formula 5 is converted into a compound of the general formula 1, wherein R1 and R2 are monovalent, unsubstituted or halogen-substituted hydrocarbon radicals having 1 to 16 carbon atoms and n is the value 1, 2 or 3.