The invention discloses a telescopic mine car capable of early warning, comprising a front compartment, a rear compartment, an infrared detector, an audible and visual alarm, a signal receiver, a slideway and a slider, and an infrared detector is installed at the front end of the front compartment , the infrared detector is connected to the signal receiver, the signal receiver is connected to the sound and light alarm, the front compartment and the rear compartment are movably connected through the slider and the slideway, and the side parts of the slider and the slideway are provided with bolt holes. When the mineral material needs to be transported, according to the amount of mineral material, adjust the position of the slider and the slideway to adjust the position of the two compartments. After adjustment, insert the bolts into the corresponding bolt holes to realize the fixing of the two compartments. The infrared detectors, signal receivers and sound and light alarms installed in the front compartment can detect whether there are staff blocking the mine car on the way, and remind in time to avoid it, which can effectively reduce the occurrence of safety accidents and protect the safety of mine vehicles. The personal safety of the staff increases the safe operability of the equipment.