The utility model provides a start -up time delay alarm device is used in colliery mining vehicle in pit, including guide's oil return circuit, guide's oil return circuit is equipped with import of pressure oil and oil -out, install the pilot operated directional control valve on guide's oil return circuit between oil -out and the import of pressure oil in proper order, but sequence valve and adjustable throttle valve, , but the pressure oil import department hookup at adjustable throttle valve has pressure oil branch road II, pressure oil branch road II and pressure oil branch road are equipped with time delay audible and visual alarm between I, but be equipped with the energy storage ware on the oil of the guide between sequence valve and the adjustable throttle valve return circuit. The utility model discloses can be applied to all collieries hydraulic drive vehicle in the pit, in delay integrated vehicle braking system of arriving of audible and visual alarm and hydraulic pressure pilot system, compulsory vehicle is the automatic acousto -optic warning that carries on before the start -up, and it starts to delay, can effectively avoid the vehicle irritability to drive a vehicle and cause the accident of the peripheral casualties of vehicle, has improved the colliery security of mining vehicle in the pit greatly.