A primary permanent magnet maglev linear motor is disclosed, consisting of primary and secondary components, Between primary and secondary there is an air gap, the length of the secondary is greater than that of the primary, the primary is composed of n armature modules, n+1 suspension module and 2n magnetic barrier, n is a positive integer and n is equal to or greater than 3, and a first suspension module, a first magnetic barrier, a first armature module, a second magnetic barrier, a second suspension module, a third magnetic barrier, a second armature module, a fourth magnetic barrier, a third suspension module,..., an nth suspension module, a 2nth suspension module and n+1th suspension module are sequentially arranged in a primary stage. The linear motor realizes the decoupling of thesuspension magnetic field and the armature magnetic field, and the magnetic conductance of the magnetic circuit through which the suspension winding magnetic field passes is independent of the secondary position, so that the levitation force control of the linear motor does not need to know the secondary position information, and the control system is greatly simplified.