The invention discloses a signal connector mold injection molding device which comprises a fixed bottom plate and an upper top plate, wherein supporting side blocks are fixed on the left part and theright part of the top surface of the fixed bottom plate, and bottom supporting blocks are fixed on the top surfaces of the two supporting side blocks; a second connecting top plate is fixed on the bottom surface of the upper top plate, and an upper die mounting connecting plate is fixed on the bottom surface of the second connecting top plate; and the signal connector mold injection molding devicecan convey a continuous strip-shaped metal piece along the side slot of an upper connecting mechanism and the inner side slot of a middle connecting mechanism, and a plurality of metal pieces are automatically poured at the same time, the continuous strip-shaped metal piece can be descended and positioned during pouring through the automatic lifting of the upper connecting mechanism and the middle connecting mechanism, and when the pouring is finished and the conveying is carried out, the direct lifting is carried out, so that the position of the processing position of the continuous strip-shaped metal piece is accurately positioned, the processing effect is guaranteed, and the efficiency is high.