PD-45 folding-arm hydraulic rock drilling jumbo is a fully hydraulic mining rig powered by a tracked travel system and a diesel engine,featuring a folding-arm hydraulic operation method. Its working structure possesses actions such as lifting, translation, fan-shaped swing, compensation, and propulsion, and it is characterized by rapid movement, stable drilling, low energy consumption, strong climbing ability, and simple operation. It can perform multi-angle operations and hole-arranging tasks. The rig is equipped with a unique hydraulic lock device for the oil cylinder, and an optional small-volume dust collector and an air compressor for slag removal are available.