Adjustable guardrail support

The utility model relates to the technical field of logistics conveying equipment, in particular to an adjustable guardrail support. Comprising a connecting rod, a guardrail connecting seat arranged at the upper end of the connecting rod, a guardrail connecting block arranged on one side of the guardrail connecting seat, a first fastener connected between the guardrail connecting seat and the guardrail connecting block, and a guardrail fixing seat arranged at the lower end of the connecting rod, the rack clamping plate is arranged on one side of the guardrail fixing seat, the second fastening piece is connected between the guardrail fixing seat and the rack clamping plate, the connecting rod is a Z-shaped rod, and the guardrail fixing seat and the guardrail connecting seat are rotationally connected with the connecting rod. The guardrail connecting base and the guardrail fixing base are connected through the Z-shaped connecting rod, the position of the guardrail connecting base relative to the guardrail fixin