The utility model discloses a vertical long -axis submerged pump, including pump lower extreme air bag seal assembly, pump upper end air bag seal assembly and transmission shaft, pump lower extreme air bag seal assembly and pump upper end air bag seal assembly are passed to the transmission shaft axial, be provided with the impeller between pump lower extreme air bag seal assembly and the pump upper end air bag seal assembly, the impeller side is the outlet pipe, pump lower extreme air bag seal assembly is provided with the filter screen outward, be provided with the lifting pipe around the air bag seal assembly of pump upper end, be provided with packing box and shaft coupling on the transmission shaft, transmission shaft upper part is connected with the motor. The beneficial effect of the utility model: with the substituted traditional mechanical seal of air bag seal assembly, keep apart antifriction bearing with external, realize the zero leakage for the strong acid alkali in the external world and the normal use that high temperature does not all influence the pump at all, antifriction bearing durable, the whole cycle of operation of pump extends.