Collecting system for waste gas of storage warehouse

A collecting system for waste gas of a storage warehouse comprises a fresh air supplementing device, a transverse collecting pipe and a vertical collecting pipe, a fresh air outlet is formed in the fresh air supplementing device, the transverse collecting pipe is higher than the vertical collecting pipe, a downward collecting opening is formed in the transverse collecting pipe, and collecting openings distributed from top to bottom are formed in the vertical collecting pipe; the system further comprises gate collecting pipes vertically arranged on the two sides of a gate of the storage warehouse, all the collecting pipes are connected to a collecting header pipe, and all the collecting ports are provided with adjusting valves. The fresh air supplementing devices are arranged on the two sides of a channel in the storage warehouse and used for conveying fresh air into the storage warehouse and providing the fresh air. The vertical collecting pipes are arranged between the adjacent goods shelves and used for col