Constructional engineering drainage device capable of conveniently extending drainage distance

The utility model relates to the technical field of constructional engineering drainage, in particular to a constructional engineering drainage device convenient for extending a drainage distance, and solves the technical problems that in the constructional engineering drainage device in the market in the prior art, personnel need to firstly measure the terrain and then install a matched drainage pipe, the drainage distance cannot be quickly and conveniently adjusted, and the construction cost is low. Therefore, the working efficiency is reduced, and the use scene of the device is limited. A constructional engineering drainage device facilitating drainage distance extension comprises a water storage bin, the upper surface of the water storage bin is fixedly connected with an input pipe, a driving motor is installed at the center of the bottom of the water storage bin, and the top of the driving motor is in transmission connection with a round pipe penetrating through the bottom of the water storage bin. The s