The invention belongs to the technical field of conductive liquid level monitoring and particularly relates to a coaxial double point-type liquid level switch. A measuring electrode A, a measuring electrode B and a common electrode are coaxially arranged from inside to outside; an isolation insulation sleeve A is arranged between the measuring electrode A and the measuring electrode B; an isolation insulation sleeve B is arranged between the measuring electrode B and the common electrode; the rear end of the measuring electrode A is provided with a locking nut A and an isolation supporting padA; the isolation supporting pad A is contacted with the rear end of the measuring electrode B; the rear end of the measuring electrode B is provided with a locking nut B and an isolation supporting pad B; an insulation elastic pad is arranged between the isolation supporting pad B and the common electrode; the front end of the measuring electrode B is provided with an isolation supporting sleeveB; the isolation supporting sleeve B is contacted with the front end of the common electrode; the front end of the measuring electrode A is provided with an isolation supporting sleeve A; and the isolation supporting sleeve A is contacted with the front end of the measuring electrode B. By adopting the high pressure-resisting coaxial double point-type liquid level switch, accurate alarming and control on the liquid level in a storage tank can be realized.