The invention provides a single magnetic pole linear compressor. The single magnetic pole linear compressor comprises a housing, a rotor, a piston and an air cylinder, wherein the rotor, the piston and the air cylinder are disposed in the housing; the single magnetic pole linear compressor further comprises a single magnetic pole stator; the single magnetic pole stator is in a circular structure; a circular groove is formed in an inner end face of the single magnetic pole stator; a coil is disposed in the circular groove; the rotor is inserted in the circular groove; the air cylinder is fixed on an outer end face of the single magnetic pole stator. By adopting the single magnetic pole stator in an integrated structure, a magnetic field generated by the coil can flow in the stator and the magnetic field leaking from the stator is reduced, thus the iron loss phenomenon is avoided and the working efficiency is effectively improved; meanwhile the air cylinder is directly mounted and fixed on the end face of the single magnetic pole stator so that the air cylinder is far away from the magnetic field formed by the coil, the leakage of the magnetic field can be further reduced, and the working efficiency of the single magnetic pole linear compressor is improved.