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-g) of 104.3-130.6 degrees C, melting temperatures (T-m) of 300.3-303.8 degrees C, and initial degradation temperatures (T-d) of 405.2-410.3 degrees 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(-1), 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.