Expansion type shield

The utility model discloses an expansion type shield, and particularly relates to the shield technical field, the shield comprises a shield main body, the two sides of the shield main body are bent to form side flanges, the bottom end of the back of the shield main body is provided with at least two lower abutting assemblies, and a moving structure is arranged between the lower abutting assemblies and the shield main body. The lower abutting assemblies can transversely move along the shield body through moving structures, expansion grooves are formed in the upper ends and the lower ends of the side flanges, and connecting pieces are inserted into the upper expansion grooves or the lower expansion grooves. By arranging the downward abutting assembly capable of moving transversely, when the shield body needs to be lowered for personnel protection, the threaded rod penetrating through the protruding block can move downwards, the bottom end of the threaded rod makes contact with the ground, the bottom face of the