The utility model relates to a passenger train brake control device, including 3U machine case, quick -witted incasement portion is equipped with the mutually independent backplate, be used for powerswitching over's electric source plate, be used for data communication the control panel, be used for data acquisition the collection board, be used for depositing stored plate and being used for human -computer interaction and audio/visual communication's roof of data storage, electricity source plate is the control panel respectively, gathers the board, deposits stored plate and roof power supply, electricity source plate, control panel, collection board and deposit stored plate and all adopt the 3U integrated circuit board to install on the connector of backplate through the draw -in groove, the roof passes through the electric interface connection of roof on cable and the backplate. The utility model discloses the brake control device adopts 3U machine case, comprises 6 blocks of mutually independent circuit boards, and the circuit board adopts the 3U integrated circuit board, connects through the connector between the circuit board, the installation, dismantles conveniently, and easy to maintain when if an arbitrary circuit board breaks down, need not the complete machine and changes, only need to change corresponding trouble the circuit board can, the maintenance cost is hanged down.