The invention is a kind of magnetism motivation vibration cylinder pressure sensor, which belongs to resonance pressure sensor; the measuring precision is high, the structure is simple, the size and weight is small; the invention includes sensitive elements and motivation circuit; the sensitive elements include insulator, insulator base, thin-wall cylinder, vacuum cavity protecting cylinder, conducting core, spring presser bits, ceramic capacitance, rare earth magnet, soft magnet, base, pressure accessing aperture, localization pin and wires; the two ends of the vacuum cavity protecting cylinder are connected with the insulator base and the thin-wall cylinder base, and forms a vacuum cavity; the conducting core is set in the thin-wall cylinder, the upper part is connected with the aperture tightly, the rare earth magnet is set at two sides of the magnet or around the magnet through the spring presser bits; there distributes four symmetrical arc ceramic capacitances boards which has gap with the thin-wall cylinder around the cylinder, the ceramic capacitance boards are fixed through localization pin and soft magnet.