The invention discloses a mining cement foaming machine using pneumatic transmission and a construction process thereof. The cement foaming machine comprises a cement mortar branch and a foaming branch which are combined in a mixer through pipes. The cement mortar branch comprises a stirring overhead tank, a water inlet pipe and an air inlet pipe, the water inlet pipe and the air inlet pipe are inserted in an inner cavity of a tank body, and the air intake pipe utilizes a gas source under a well. The foaming branch comprises a foam maker generating foaming foam, a water inlet pipe, an air inlet pipe and a foaming agent conveyer pipe, the water inlet pipe, the air inlet pipe and the foaming agent conveyer pipe are connected with an inlet of the foam maker, and the other end of the foaming agent conveyer pipe is connected with an output end of the foaming agent container. The string overhead tank transports cement mortar to the mixer utilizing compressed air in the gas source after cement is stirred, the cement mortar and the foaming foam continuously transported from the foam maker are mixed to form foamed cement. A water source and a gas source under a well are utilized to foam and transporting foamed cement, a motor can be removed, and only one motor used for driving a stirring shaft is disposed in complete equipment.