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1. An upside-down sprayer with an auxiliary air conducting device for liquid pumping, wherein an auxiliary air conducting device is provided in an upside-down sprayer structure, which comprises a container, a nozzle, and a dip tube, wherein the nozzle is assembled to the container by means of a locking cap, the nozzle has an outlet passageway and a check valve disposed at a location of the outlet passageway, and the nozzle has a negative pressure suction chamber communicating with the outlet passageway by means of a flow-through orifice and also communicating with the inside of the locking cap by means of an air orifice; the dip tube has an upper end and a lower end, the upper end being connected to the outlet passageway and the lower end extending into the container, and the dip tube is equipped with a switching valve adjacent to the upper end comprising a valve casing, a valve ball, and more than one inverted liquid pumping port formed in the valve casing; wherein the upside-down sprayer can be operated in either an upright mode or an inverted mode; the auxiliary air conducting device is disposed adjacent to the switching valve of the dip tube, comprising a connection part, a guide seat, and a projecting tube with an opening, wherein the connection part being used for connecting and positioning on the dip tube, a groove being provided on an upper surface of the guide seat in a spaced and corresponding relationship with the air orifice of the negative pressure suction chamber, and the projecting tube being projected on a lower surface of the guide seat and being communicated with the groove; the opening of the projecting tube is offset in a direction of the more than one inverted liquid pumping ports of the switching valve, and a height of the opening is not lower than a height of the more than one inverted liquid pumping ports when used in the inverted mode.
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