▎ 摘　　要

NOVELTY - Loaded catalyst i.e. substituted 3,5-diphenyl-3{4},5{4}-diaza-11{5}-aza-4-ferratricyclo5.3.1.0{4,11}undeca-1(11),2,5,7,9-pentaen-11-ylium compound (I), is new. USE - (I) is useful for preparing polyolefin (claimed). ADVANTAGE - (I) has excellent catalytic activity. DETAILED DESCRIPTION - Loaded catalyst i.e. substituted 3,5-diphenyl-3{4},5{4}-diaza-11{5}-aza-4-ferratricyclo5.3.1.0{4,11}undeca-1(11),2,5,7,9-pentaen-11-ylium compound of formula (I) is new. R1-R13= H, 1-12C alkyl, fluorine, chlorine, bromine, iodine, nitro, hydroxy, optionally substituted silyl or phenyl; X and Y = fluorine, chlorine, bromine, iodine, 1-12C alkyl, aryl, oxygen-containing group, nitrogen-containing group, sulfur-containing group, boron-containing group, aluminum-containing group, phosphorus-containing group, silicon-containing group or tin-containing group (can be bonded to each other to form ring); and M = lithium, sodium, potassium, rubidium or cesium, preferably lithium, sodium, or potassium. INDEPENDENT CLAIMS are also included for: Preparation of (I); and Preparing polyolefin, comprising adopting (I) to catalyze the polymerization of olefins to obtain final product.