The jib and counter jib of top-kit tower crane have the characteristics of small cross-section and reasonable force distribution. The installation method of jib pull rod is unique, simple, safe, and labor-saving. Meets the requirements of urban cranes. Its jib has smaller cross-section, more reasonable force distribution, and improves the overload resistance of tower head, resulting in higher safety and reliability. Steel structure has long service life and high safety: compared with flat-top tower crane, it adopts pull rod form to reduce the force on jib, and the cross-sectional dimension of jib is small. Tower cranes with pull rods reduce transportation costs. The design of large tower cranes often adopts pull rod form, which has relatively high cost-effectiveness.