Specially designed for surface pretreatment prior to thermal spraying, the sandblasting equipment is mostly equipped with a high-pressure steady-pressure sandblasting system, wear-resistant boron carbide nozzles and a CNC precision positioning mechanism, and fitted with a high-efficiency pulse dust removal device to reduce dust pollution; it can flexibly adopt various abrasives such as brown fused alumina, white fused alumina and glass beads, and through precise regulation of sandblasting pressure, angle and moving speed, it performs rust removal, oxide scale removal and roughening treatment on the surfaces of workpieces like mechanical parts, aerospace components and wind turbine blade substrates, effectively improving the surface roughness and activity of workpieces, enhancing the bonding force between the subsequent thermal spray coating and the substrate, and meeting the stringent process requirements for workpiece pretreatment in the thermal spraying industry.