Overwater photovoltaic guardrail and combination and locking device thereof

The utility model relates to the technical field of overwater photovoltaic guardrails, and discloses an overwater photovoltaic guardrail and a combination and locking device thereof, the locking device comprises a first lantern ring which is sleeved on a side wall near the bottom end of a guardrail rod and is connected with a connecting part of a photovoltaic floating body; the two annular plates are fixedly arranged on the side wall of the first lantern ring in a sleeving manner and are distributed up and down; according to the utility model, the first lantern ring is connected with the connecting part of the photovoltaic floating body, so that the guardrail is limited; when the guardrail rods shake under the action of external wind power and the like, the guardrail rods drive the first connecting plates to compress or stretch the corresponding first elastic assemblies through the connecting assemblies so as to achieve buffering and reduce the shaking amplitude, and the first connecting plates and the second