sm-35 molecular sieve, also known as magnesia alkali zeolite, belongs to the orthogonal crystal system, FER type topological skeleton structure, with 8-membered ring and 10-membered ring of the vertical cross two-dimensional channel system. As an acidic catalyst, zsm-35 is mainly used for isomerization (e.g., isomerization of n-butylene skeleton to isobutylene, isomerization of xylene, isomerization of n-structure C4 and C5 olefin skeleton), aromatics alkylation, aromatization, olefin oligomerization, modification of reforming fluid and naphthalene, catalytic cracking and reduction of pour point of fuel oil, etc.