Installation method of small starfish type tension leg platform

The invention provides a mounting method of a small starfish type tension leg platform. The mounting method comprises the following steps: S1, transporting a lower floating body to an operation sea area, and connecting the lower floating body with a suction anchor preassembled on a seabed; enabling the lower floating body to dive to a preset depth and reach balance; s2, the upper floating body is dragged to an operation sea area in a dry mode; the upper module is connected with the tug through a temporary mooring rope; the air bag is inflated, so that the upper module floats on the water surface; s3, the lower floating body slowly floats upwards, a first sleeve, a second sleeve and a third sleeve on the upper module are sequentially aligned with a first guide pile, a second guide pile and a third guide pile on the lower floating body, and the weight of the upper module is slowly transferred to the lower floating body until the air bag completely floats out of the water surface; and S4, the anchor chain is ten