A series of processable semi-aromatic polyamides containing thioether and methylene units were synthesized through the reaction of 4,4 ′-thiobis(methylene)dibenzoyl chloride and aliphatic diamine by the method of interfacial polycondensation. These polyamides had excellent thermal properties with glass transition temperatures ( T) of 104.3-130.6 °C, melting temperatures ( T) of 300.3-303.8 °C, and initial degradation temperatures ( T) of 405.2-410.3 °C. They had wider processing windows than traditional semi-aromatic polyamides (such as PA6T can not be processed by melting) and can be processed by melting method. They had better tensile strengths of 57.6-64.1 MPa, low-temperature mechanical properties, low water absorption of 0.19-0.27 %, low dielectric constants of 3.11-3.95 at 100 kHz, and better melt flowability properties of 232-60.7, 301.9-78.8, and 423.1-83.6 Pa s under a shear rate ranging from 20 to 1,170 s, respectively. In addition, these polyamides showed good corrosion resistance, they did not dissolve in solvents such as NMP, DMSO, hydrochloric acid (6 mol/l), and solution of NaOH (1 mol/l) and so on. [ABSTRACT FROM AUTHOR]