The invention relates to the field of relay terminal production equipment and particularly relates to a tinning and detecting device for a relay terminal. The device comprises a supporting mechanism,a rotating mechanism, a fixed mechanism, a welding aiding mechanism, a tinning mechanism, a discharging mechanism, a detecting mechanism and a sorting mechanism. The supporting mechanism is verticallyarranged, the tinning mechanism is fixedly connected to the supporting mechanism, the discharging mechanism is fixedly connected to the supporting mechanism, and the detecting mechanism is fixedly connected to a side wall of the supporting mechanism. The tinning mechanism comprises a first cylinder, a second cylinder, a tin scraping block and a tin liquid pool. The detecting mechanism comprises athird cylinder, a fourth cylinder, a first detecting head and a second detecting head. According to the tinning and detecting device for the relay terminal, the automatic tinning of the relay terminal is carried out, at the same time, the relay terminal is automatically taken down, the relay terminal is detected, relay terminals of different problems are classified, the workflow is simplified, the work and production efficiency are improved, the relay terminal is convenient to tin and detect, the dependence on persons is reduced, and the automatic integrated production is achieved.