Telescopic portable grassland survey sample square frame

The utility model discloses a telescopic portable grassland survey sample square frame, and belongs to the field of sample survey. A telescopic portable grassland survey sample square frame comprisesfour combined frames, an adapter block is arranged between every two adjacent combined frames, each combined frame is composed of a plurality of connecting rods and a plurality of connecting pipes, grid connecting pieces are arranged in the middles of the connecting pipes, connecting mechanisms are arranged at the ends of the connecting pipes, and supporting rings are arranged at the ends of cylinders. An elastic rod is arranged at the bottom end of the second sliding block, and limiting grooves are formed in the two ends of the inner side of the connecting rod. According to the utility model,the plurality of connecting rods and the plurality of connecting pipes are connected together to form a combined frame with a corresponding length required by a worker, and the combined frame and theadapter block are connecte