The utility model provides a power equipment prevents guardrail bar convenient to dismouting, the on -line screen storage device comprises a base. Installation expansion bolts is connected to the left and right sides of base, the last expansion block that sets up of expansion bolts, the top welding of crossing the cab apron has the stiffening rib, the top of stiffening rib is fixed with the lower part bracing piece, extend and connect the top of chamber setting at the stiffening rib, fastening bolt sets up the junction at lower part bracing piece and upper strut pole, the top at the lower part bracing piece is fixed by the gap of splitting to the upper strut pole, the fracture gap sets up the junction at fastening bolt, the conduction piece is fixed on the upper strut pole, the extension connecting rod is connected to the below of protection iron wire, extend the connecting rod and fix the right side at upper strut pole and lower part bracing piece, inboard installation fluorescent tube is placed to the poster, the utility model discloses can be convenient with the rail guard dismouting, satisfy the operation requirement, the installation with detect conveniently, the security performance is higher, and connects the fastening, the practicality is stronger.