Alkoxylation reaction method for polyalcohol or mixed alcohol ether

The invention discloses an alkoxylation reaction method for polyalcohol or mixed alcohol ether. According to the method, an L-B acid bond laminated column molecular sieve solid catalyst is adopted, and the catalyst uses a laminated column molecular sieve as a carrier which carries 3 to 10 mass percent of L-B acid; and based on the total mass of the catalyst, the carrier has a structure of Al4Si8O20(OH)4.nH2O and mainly contains the following components in percentage by mass: 7 to 13 percent of Al2O3, 3 to 4 percent of FeSO4, and the balance of SiO2. The conditions of the reaction comprise that the reaction temperature is between 30 and 200 DEG C, the reaction pressure is between 0.1 and 0.3MPa, the molar ratio of alcohol to epoxide is 2 to 9, and the using amount of the catalyst accounts for 1 to 10 percent of the total mass of the material. Because the L-B acid bond laminated column molecular sieve solid catalyst is used, the method effectively inhibits side reaction during production of alcohol ether, reduc