The invention relates to the technical field of coal bunker depth measurement, in particular to an electric portable coal bunker depth detector, which includes a handle, an upper unit fixing rod, a rotating shaft and a lower unit fixing rod, and the front end of the handle is fixedly connected with the upper, middle and lower distribution button, the lower end of the handle is fixedly connected with an upper unit fixing rod, the right side of the lower end of the upper unit fixing rod is fixedly connected with a rotating shaft, and the upper unit fixing rod is connected with a lower unit fixing rod through the rotation of the rotating shaft, and the lower unit fixing rod The front end of the unit fixed rod is slidingly connected with the limit device, and the left end face of the upper unit fixed rod and the left end face of the lower unit fixed rod are fixedly connected with a connecting device; By rotating the motor to drive the take-up wheel to rotate, the speed of releasing and receiving the rope can be increased, and there is no need for manual hand-held take-up and take-up, greatly improving work efficiency, easy operation, labor-saving, no manual contact, clean and hygienic, and has good practical value .