The invention discloses a device for product detection. The device comprises an installing base table and a supporting base frame. The supporting base frame is arranged on the installing base table. The installing base table is provided with a conveying mechanism. The conveying mechanism is provided with a stop mechanism. The supporting base frame is provided with a discharging drive mechanism. The discharging drive mechanism is connected with a folding mechanism. The folding mechanism is fixedly connected with an L-shaped push rod. The supporting base frame is provided with a supporting platform. The supporting platform is provided with a spring base. The spring base is provided with a connecting platform. The connecting platform is provided with an avoiding mechanism. The connecting platform is provided with a baffle. The baffle and the avoiding mechanism are located on the two sides of the conveying mechanism correspondingly. The L-shaped push rod and the avoiding mechanism are located on the same side. The device can rapidly finish the discharging work on disqualified mechanical accessories and is automatic and efficient, the proportion of the disqualified products in mechanical accessory finished products is reduced, accordingly, the assembling quality of mechanical accessories is improved, the mechanical accessory production efficiency is improved, and cost is reduced.