The tower-hat tower crane has a reasonable structure design and adopts special displacement tooling for positioning and group welding. The key welding seam is intelligent robot welding. The group welding is accurate, interchangeable, stable in quality and smooth in appearance. Some high-precision parts are processed as a whole after welding, which effectively reduces the influence of welding deformation on positioning accuracy. The overall assembly structure has good rigidity and large bearing capacity. The electronic control system uses a safety control system and selects advanced drive schemes in the industry to effectively reduce energy consumption and improve the working stability of the tower crane to ensure reliable operation of the tower crane; the lifting and luffing mechanism has high working speed and good speed regulation performance , Work smoothly and reliably. The slewing mechanism has stepless speed regulation, stable starting and braking, and no impact. The overall product quality has a clear advantage in market competition and is well received by customers.