The invention discloses a secondary fusion intelligent terminal detection assembly line. The detection assembly line comprises a conveying unit, a testing unit, a wiring unit, a mechanical arm and a management and control unit, wherein the conveying unit comprises a first conveyor and a second conveyor; the testing unit comprises a primary control cabinet, a secondary control cabinet and a test wiring cabinet; the wiring unit comprises a power supply wiring board, a test plug-in board, an aviation plug connector and a cable; the mechanical arm comprises a fixing base, a connecting arm, a mounting disc and a mechanical gripper; the management and control unit is connected with the conveying unit, the testing unit, the wiring unit and the mechanical arm separately. According to the assemblyline, all parts are clear in work division and managed in a unified mode; by arranging the conveying unit, the testing unit, the wiring unit, the mechanical arm and the management and control unit, conveying, port plugging and system testing of an intelligent terminal are realized, the detection process of the intelligent terminal is optimized, and the detection efficiency is improved.