Protection device convenient to mount and dismount

The utility model relates to the technical field of pig casting machine casting protection equipment, and discloses a protection device convenient to mount and demount, which comprises a first protection frame and a second protection frame, the first protection frame is clamped on one side of the second protection frame, and the front and rear sides of one side of the first protection frame close to the second protection frame are fixedly provided with bumps. Grooves are formed in the positions, close to the two protruding blocks, of the second protection frame, the two protruding blocks are arranged in the two grooves in a clamped mode respectively, and spring cavities are formed in the positions, close to the two protruding blocks, of the first protection frame. The first protection frame and the second protection frame are fixed to the outer side of the casting mold box through mutual clamping connection of the protruding blocks and the grooves and mutual clamping connection of the clamping strips and the