Extension ladder for assembling prefabricated sheets of fan mixing tower

The utility model provides an extension ladder for assembling a fan mixing tower prefabricated sheet, which comprises an extension ladder support plate for climbing when the fan mixing tower prefabricated sheet is assembled, a pedal plate is arranged on one side of the top of the extension ladder support plate, an extension ladder main body is arranged on the top of a first connector, a workbench is arranged on the top of the extension ladder main body, and a second connector is arranged on the workbench. Second connectors are arranged on the two sides of the top of the workbench in the width direction correspondingly, adjusting devices are arranged at the four corners of the bottom of the workbench correspondingly, and a conveying assembly capable of providing assembling tools conveniently when an assembling worker assembles prefabricated sheets is arranged on the side, away from the extension ladder body, of the workbench. When an assembling worker needs to use an assembling tool, a lifting cabinet is start