The utility model discloses a colliery is one -way aerial passenger device in pit, including driven machine head, haulage rope, a plurality of support rope subassembly and hanging seat subassembly that sets up along direction of delivery, driven machine head includes drive chassis, and last rope body reel, driving motor, first deflector roll and the second deflector roll installed of drive chassis, driving motor pass through the reduction gear to be connected with the drive of rope body reel, and it has the haulage rope to coil on the rope body reel, ask the rope subassembly to include supporting beam, the supporting beam below has upper portion to hold in the palm rope sheave and lower part support rope sheave through the support mounting, the haulage rope is walked around first deflectorroll, a plurality of lower part in proper order from rope body reel and is held in the palm after rope sheave, a plurality of upper portion holds in the palm rope sheave, second deflector roll rollback to rope body reel setting, being located the high order end and asking rope subassembly and low order end to hold in the palm to be provided with the hanging seat subassembly on the haulage rope between the rope subassembly, this practicality can automatic tensioning haulage cable, prevents that the haulage cable amount of deflection from increasing, operate steadily, reliably, safety, ensure to take the personal security.