The invention discloses a dumping plough material pile height detection device. The dumping plough material pile height detection device comprises a detection case. Multiple laser displacement sensors are arranged in the detection case. The laser displacement sensors are uniform arranged on the top of the interior of the detection case. Two sides of the detection case are provided with connection rod parts. Each one of the connection rod parts comprises a short shaft and a connection rod, one end of the short shaft is provided with a flange plate, and one end of the connection rod is provided with a sleeve, the sleeve is sleeved on the short shaft, the sleeve is in a sliding fit relationship with the short shaft, the other end of the short shaft is provided with a shaft end cover, the shaft end cover is fixed by a screw, and the other end of the connection rod is fixed to the detection case. The detection device also comprises a programmable logic controller (PLC). The dumping plough material pile height detection device is provided with the multiple laser displacement sensors, realizes non-contact measurement, reduces measuring equipment wearing, is free of impact on materials, improves safety reliability and has strong practicality.