The invention discloses a crane fretting control device and an adjusting method. The crane fretting control device comprises a lifting device upper bracket and a fretting devices arranged on four sides of the lifting device upper bracket. Each fretting device comprises a fixing bracket, supporting wheels, a pulley bracket, a pulley and a driving mechanism. Sliding grooves are formed in the fixingbrackets. The supporting wheels are arranged in the sliding grooves. The supporting wheels are rotatably connected with the pulley brackets. The driving mechanisms are arranged on the fixing brackets.The driving mechanisms are adopted to drive the pulley brackets to move horizontally. The pulleys are rotatably arranged on the pulley rackets by pulley shafts. Compared with the prior art, frettingis achieved by the four fretting devices, and the lifting device upper bracket is guaranteed not to incline during adjusting; and the fretting devices are simple in structure, are low in manufacturingcost, are stable in adjusting and are high in control accuracy. In addition, through the adjusting method, a lifting device can be accurately positioned, horizontal translation and rotating frettingcontrol can be achieved; and the lifting device does not incline, and therefore working security is reliable.