The invention discloses a metal surface rust-removing and sandblasting device, which comprises a sandblasting device body. The sandblasting device body is composed of a work box, an overturn mechanism, an air purifier, a sandblasting mechanism, and an adjusting mechanism. One side of the work box is connected to the overturn mechanism. The interior of the work box is connected to the adjusting mechanism. The structure is compact and thus the device is very convenient for metal rust removing and sandblasting. Due to the overturn mechanism, during sandblasting, the workpiece can be automaticallyoverturned by the overturn mechanism without any artificial intervention, time and labor are saved, the sandblasting becomes more uniform, the rusts can be removed more radically, the work efficiencyis largely improved, the practicality is strengthened; through the adjusting mechanism, the sandblasting becomes omnidirectional, no dead angle exists, due to a sealed space, the blasting sand can berecovered, moreover, the generation of waste gas that pollutes the atmosphere is avoided; the air purifier can purify the exhaust gas, and the work environment is improved for the workers.