Locking mechanism, locking device and carrying platform

The invention provides a locking mechanism, a locking device and a carrying platform. The locking mechanism provided by the invention comprises a tension rod which extends along a first direction and is provided with a first end and a second end which are opposite to each other in the first direction; the locking piece is mounted on the tension rod, and the locking piece is close to the first end of the tension rod in an unlocked state; the rod frame is connected with the tension rod, is positioned between the locking piece and the second end in the first direction, and is used for pressing the flat plate type stacked satellites on an adapter for placing the flat plate type stacked satellites; the mounting seat is used for connecting an adapter; and the rocker arm is connected with the mounting seat through a first connecting piece and is connected with the second end of the tension rod through a second connecting piece. When the locking mechanism is used for pressing, the tension rod and the rocker arm are l