Linear motor secondary part is a useful one of new style. In linear motor, as rotating motor stator, it is called primary part, as rotating motor rotor, called secondary part. When alternating current is circulated in the primary part, the secondary part makes linear movement along primary part under the function of electricity magnetic force. Permanent magnetic linear motor secondary part, which replaces traditional secondary coil, has smooth magnetic force, and is not impacted by the outer voltage. It has simple construction, not-contact, non-frayed, low noise, quick speed, high precision and flexible assembly.