Mounting tool and mounting method

An installation tool comprises a shell and a driving mechanism located in the shell, the shell comprises a first shell and a second shell which are independent of each other, the first shell is provided with a first claw part, the second shell is provided with a second claw part, and the first claw part and the second claw part are clamped under the action of driving force of the driving mechanism. At least one of the first shell and the second shell can move away from the other shell so as to increase the distance between the first claw part and the second claw part. The invention further relates to an installation method which uses the installation tool and is used for installing the stainless steel top piece on the stainless steel ring. According to the mounting tool and the mounting method, the stainless steel top piece can be conveniently and quickly mounted on the stainless steel ring, so that sealing between the CIPP repair lining pipe and an original pipeline is facilitated. 一种安装工具，包括壳体和位于所述壳体内的驱动机构，所