Normal-temperature continuous dyeing preshrinking equipment and preshrinking box

The utility model discloses normal temperature continuous type dyeing preshrinking equipment and preshrinking box, according to the processing sequence of braid, the preshrinking box comprises a placing box, a feeding assembly, a dyeing assembly, a steam box, a cleaning assembly, a preshrinking box, a drying cylinder and a storage box in order, the preshrinking box further comprises a preshrinking box body, the left side wall and the right side wall of the preshrinking box body are provided with a belt inlet and a belt outlet, a first transmission roller set and a second transmission roller set are connected into the preshrinking box and each composed of a plurality of round rollers and two square rollers, a gas pipe box is arranged at the bottom of the preshrinking box, a steam box is arranged on the right side wall of the preshrinking box, a first gas pipe is arranged in the gas pipe box, and a second gas pipe is arranged in the steam box. The first air pipe is communicated with the steam box, a plurality o