Solid superacid catalyst as well as preparation method and application thereof

The invention provides a solid superacid catalyst. The solid superacid catalyst comprises a carrier, ZrO2 and SO4 < 2->, wherein the ZrO2 and the SO4 < 2-> are loaded on the carrier; wherein in the catalyst, the total acid amount of the B acid is more than 700 [mu] mol/g. The solid superacid catalyst has proper total acid amount of B acid, so that the solid superacid catalyst is particularly suitable for being applied to transalkylation reaction, and particularly, the solid superacid catalyst is capable of finally optimizing product distribution, reducing reaction temperature and reducing side reaction. 本发明提供一种固体超强酸催化剂，包括：载体和负载在所述载体上的ZrO2和SO42-；其中，所述催化剂中，B酸总酸量为700μmol/g以上。该固体超强酸催化剂由于具有适宜的B酸总酸量，特别适宜应用于烷基转移反应中，具体表现在能够最终优化产品分布、降低反应温度以及降低副反应的发生。