The invention provides a roller-replacing trolley. According to the invention, a roller comprises a shaft head and a roller notch; the roller-replacing trolley comprises a roller traction trolley, a
traction motor, a motor transmission traction mechanism, a connection rod lifting mechanism, a
rocker arm, a two-force rod, a support frame, a support block, a support rod, an
electric control cabinetsupport, an
electric control cabinet, a
hydraulic pump station, a lifting guiding wheel, a walking transmission motor, a transmission shaft, a
hydraulic cylinder, a wheel, a guiding rail, a roller-replacing sphere top
hydraulic cylinder, a shaking hand wheel, a roller clamping plate, a positioning pin, a
synchronizing shaft, a trailer wagon
headstock and a sliding rail. The roller-replacing trolley provided by the invention brings great convenience for continuous
zinc coating and the replacement of the roller in a
degreasing section of an annealing line, the time for replacing the roller is reduced, the labor intensity of workers is lightened, and the production cost is reduced for a
production line. The roller-replacing trolley is simple to operate, safe and reliable, shows humanity management of mechatronics and is inevitable equipment for a
strip steel production line.