The invention relates to the technical field of self-priming pumps, in particular to an idling-resistant liquid-land dual-purpose integrated modular temperature-resistant and corrosion-resistant self-priming pump. The self-priming pump comprises a motor, a pump head driven by the motor and used for sucking liquid; the motor comprises a motor shell, a motor shaft, a rotor and a stator, the self-priming pump is characterized in that the motor adopts a corrosion-resistant motor, the surface of the rotor is coated with a rotor plastic shell to form a rotor assembly, and the gap between the statorand the rotor assembly ranges from 60 microns to 600 microns; the pump head adopts a plastic pump head, the output end of a corrosion-resistant motor shaft of the motor is connected with an impeller bottom plate of the pump head. Compared with the prior art, no magnet is needed, the magnetic gap can reach 60 -600 microns, and the problem that the magnetic gap of an asynchronous motor is narrow issolved; the structure is simple, transmission is simple, wear resistance and corrosion resistance are achieved, self-suction is achieved., the defects that a magnet pump is complex and easy to damage,and easy to leak and free of idling are overcome.