A method is introduced for the calculation of the intensity of the welding column of steel structure workshop and cantilever shoulder nodal point.

From the heat preservation heat insulation,the fire protection,the temperature expands and contracts,the room covers the support,the structure anticorrosion,set up the surface design and so on several aspects to make the discussion to the steel structure workshop design,causes the steel structure workshop tends the security,the economy,artistic.

Combining with the destruction situation of the power plant in Wenchuan large earthquake,the author analyzes causes of the main workshop structure seismic destruction,provides attention problems in the main workshop structure anti-seismic design,so as to establish multi-line defense of the main workshop anti-seismic,ensure people\'s life and property safety.