The invention discloses a bin gate opening and closing device for a specific protein analyzer. The bin gate opening and closing device comprises a bin gate guide mechanism (1), a fixed pulley mechanism (2), a variable damping moveable pulley block (4) as well as a connecting rod (3), wherein the bin gate guide mechanism (1) is mounted at the top end of a rack plate (6) which is arranged in a vertical direction; the fixed pulley mechanism (2) is mounted at the upper part of the rack plate (6); the variable damping moveable pulley block (4) is mounted on the rack plate (6) and is positioned below the fixed pulley mechanism (2); a reagent holder (7) which can move up and down along the rack plate (6) is mounted on the rack plate (6); the reagent holder (7) is driven through a driving device; one end of the connecting rope (3) is connected with a bin gate body (19) of the bin gate guide mechanism (1); the other end of the connecting rope (3) spans a fixed pulley (23) of the fixed pulley mechanism (2) and a moveable pulley (15) of the variable damping moveable pulley block (4) and is connected with the reagent holder (7). The bin gate opening and closing device for the specific protein analyzer does not need to be driven independently and is convenient to control.