The invention relates to a dynamic sealing vertical self sucking pump with high suction lift, wherein, a motor is connected and fixed to a pump bracket via bolts; a pump case is composed of a pump water-absorbing chamber and a pump water pressure chamber and is connected with the pump bracket; the left side and the right side of the pump case are provided with a self sucking pump inlet and a pumpoutlet, wherein the self sucking pump inlet is provided with an electromagnetic vacuum breaker valve; the upper part of the pump case water pressure chamber is provided with an automatic vent valve; an impeller is connected with a pump shaft via a connecting key, and the periphery of the impeller is provided with a guide vane type air and liquid mixer; a clapboard is arranged between the outer edge of the guide vane type air and liquid mixer and the pump outlet; and the pump shaft is connected with a motor shaft via a coupler. The dynamic sealing vertical self sucking pump also comprises a dynamic sealing device and a dynamic supercharging device, wherein the dynamic sealing device is arranged on the joint of the pump shaft and the pump bracket; the dynamic supercharging device is arranged between the pump water pressure chamber and the self sucking pump inlet. The self sucking pump of the invention solves the problem that the common vertical self sucking pump is easy to leak and be damaged, can normally self suck and can stably work under high suction lift.