Supported metallocene catalyst for olefin polymerization and preparation method and application thereof

The invention relates to a supported metallocene catalyst for olefin polymerization and a preparation method and application thereof, the catalyst has a structure as shown in formula (I): wherein Cp'and Cp ''are respectively and independently cyclopentadienyl or substituted cyclopentadienyl, and Cp' and Cp ''can be the same or different; m is a group IVB element Ti, Zr or Hf; q is halogen; n is V main group element nitrogen; si'is a carrier. The metallocene loading capacity of the catalyst is high; after loading, good fluidity is still maintained, the cost of the catalyst is low, carbonyl in organic silicon can be coordinated with metallocene M (Zr, Ti and Hf), and the stability is enhanced. 本发明涉及一种烯烃聚合用负载茂金属催化剂及其制备方法和应用，催化剂具有式(I)所示结构：其中，Cp'和Cp″各自独立地为环戊二烯基或取代的环戊二烯基，Cp'和Cp″可以相同或不同；M为第IVB族元素Ti、Zr或Hf；Q为卤素；N为第V主族元素氮；Si'为载体。该催化剂茂金属的负载量高；负载后仍保持较好的流动性，催化剂成本较低，有机硅中的羰基还可以和茂金属M(Zr，Ti，Hf)配位，增强稳定性。