The invention relates to a catalyst for preparing main product propylene from C4 and high carbon number olefin. The catalyst consists of ZSM molecular sieves, modifying components and an adhesive. The silicon-aluminum ratio of the ZSM molecular sieves is 30-800, and the grain size is 50-1000nm; the adhesive is aluminum oxide or/and silicon oxide; and elements of the modifying components contain alkali metal and/or alkaline earth metal, phosphorus elements and lanthanide elements. The catalyst has higher propylene yield and low hydrogen transfer degree; and the yield of by-products C1-C3 alkanes is low, and the stability of the catalyst is high.