The workshop was built in 80s, the original structure is two storey frame structure, and the column foundation is 1.8 meters deep. Due to the expansion of the owner's production scale, the original plant can not meet the new equipment layout needs, so according to the new load-bearing situation of the factory, the reinforcement and transformation of the factory will meet the load bearing requirements. Due to the increase of the bearing capacity of the roof, it is necessary to reinforce the frame beam and floor with carbon fiber fabric and steel plate.