A synchronic drawer slide rail system with a mute springback function includes: two slide rail units, wherein two external faces of a drawer are connected to two internal faces of a cabinet in a relative sliding form through the slide rail units which are symmetrically arranged; the two slide rail units are synchronically connected to each other through a synchronizing mechanism; wherein a shell unit is fixed on each of the two internal faces of the cabinet; a linear groove extending along a relative sliding direction of the drawer and the cabinet is provided on a side face, which faces the drawer, of the shell unit; each of the slide rail units is installed in the linear groove; a horizontal board extending towards the drawer is arranged at a bottom face of the shell unit, and a rack is provided on an inner end of the horizontal board.