Connector for connecting Christmas tree body and wellhead riser and mounting method thereof

The invention discloses a connector for connecting a Christmas tree body and a wellhead riser and an installation method thereof.The connector comprises a base body, the base body is a cylindrical body, a center through hole is formed in the center of the base body, the upper portion of the center through hole is fixedly connected with the Christmas tree body through a connecting device, and the lower portion of the center through hole is movably connected with the wellhead riser through a locking assembly; the locking assembly comprises locking blocks distributed in an annular array mode, an elastic component is arranged between every two adjacent locking blocks, the elastic components enable the locking blocks to expand on the hole wall of the center through hole, a driving ring is slidably connected into the center through hole in a sleeved mode, a first oil cavity is defined by the upper end of the driving ring and the base body, and an insertion part is arranged at the lower end of the driving ring. The