The invention discloses a rotary automatic PCB cleaning device. The rotary automatic PCB cleaning device comprises a base, two stand columns, a top frame, a first servo motor, a lead screw, a feed nut, a sliding seat, two supporting rods, a support plate, triangular supporting plates, extension rods, water jet cutter mechanisms, a trough, a supporting seat, a second servo motor, a gear, a slewing bearing, a working table, a controller and more than two feeding mechanisms, wherein the two stand columns are arranged in parallel along the base; the two supporting rods are symmetrically arranged along the sliding seat; the triangular supporting plates are arranged symmetrically along the support plate; a PCB is placed in a slot and is fixed by manually tightening hand screws; the second servo motor drives the working table to rotate at a set angle; after an electric push rod pushes a U-shaped clamping frame to move forwards in place, the first servo motor drives the sliding seat to move towards the U-shaped clamping frame by a set distance, then high-pressure water is pumped into the water jet cutter mechanisms, and chippings on the surface of the PCB and in holes of the PCB are eliminated. The device is simple in structure, good in cleaning effect, high in water resource utilization rate, high in degree of automation and high in cleaning efficiency.