Dialkene polymers and preparation method thereof

The invention provides dialkene polymers, a dialkene polymer preparation method and the dialkene polymers prepared by the preparation method. The dialkene polymers contain two polymers having structures represented by the formula (I), and have a three-peak molecular weight distribution, wherein R is C1-C8 alkyl, C3-C8 cycloalkyl, C6-C18 substituted or unsubstituted aryl or C7-C18 aralkyl, Y is halogen, Z is a polymer chain containing a monovinylarene structure unit and a conjugated dialkene structure unit, a is 0-3, b1 is 0-3, b2 is 1-4, moreover, and a+b1+b2=4; and the values of b2 of the two polymers having the structures represented by the formula (I) are different. Dialkenes have relatively good processing performance, and extremely have industrial application prospects. The formula (I) is RSiYZ.