English：

The east and west facades of No. 1 tower in plot 4-14 of Jinan Central Business District projectfeature a variable-angle curved design. The overall inclination angle decreases progressively from thebottom to the top,with the maximum inclination angle of 7.11°. To address construction challenges suchas the difficulty in implementing external protection measures caused by this curved facade, a variable-angle attached lifting protection platform is designed based on the concept of the attached lifting safetyprotection platform for building construction. This design utilizes plate-type supports with adjustablesetting angles to alter the inclination angle of the platform frame. This enables the protection platformframe to ascend and descend normallywhile inclined at a specific angle, thereby adapting to theconstruction protection requirements of the variable-angle curved facade. The finite element softwareSAP2000 is employed to conduct a comprehensive mechanical analysis of the platform frame under threedistinct working conditions （ normal use, inclement weather, and lifting） at inclination angles of 0°,7.11°, 10°. Practical application is also carried out. The research results show that both thedisplacement values and stress ratios of the variable-angle attached lifting protection platform frame underthe three angles （ 0°, 7.11°, 10°） and three working conditions significantly increase as the frameinclination angle increases, and all remain within the limits specified by relevant codes.