The invention discloses a movable main ventilator for gallery ventilation. The movable main ventilator for the gallery ventilation comprises an axial flow ventilator, and further comprises a movable machine frame, wherein a carriage wheel, a hydraulic leg used for supporting and lifting the movable machine frame and a telescopic mechanical leg used for supporting the machine frame are arranged atthe bottom of the movable machine frame, the height of the telescopic mechanical leg under extension status is less than the height of the hydraulic leg under stretching status, and when the telescopic mechanical leg is under contracting status, the lower end position of the telescopic mechanical leg is higher than the lower edge of the carriage wheel. When an operator needs to push the movable main ventilator for the gallery ventilation forwards, the operator does not need to perform operations of ventilator disassembly, machine frame disassembly, machine frame assembly, ventilator assembly and the like, and the movable main ventilator can be transferred forwards through a trailer, and therefore the movable main ventilator is high in forward transfer speed, high in forward transfer efficiency, and capable of saving lots of time and labor.