The invention relates to a method for realizing fast construction of ground pit earthwork in rainy season. The method is mainly used for solving the problem that when the existing ground pit earthwork is constructed in rainy day, the vehicle is trapped in spoil ground and can not discard the spoil, the ground pit earthwork construction is stopped, the construction period is prolonged, and the engineering cost is increased. The invention provides a method for realizing fast construction of ground pit earthwork in rainy season, which is characterized in that a transport vehicle is used for transporting the earthwork dug from the ground pit by digging tool to the spoil ground, the driving channel for the earthwork transport vehicle is built in advance in the spoil ground, and the earthwork transport vehicle discards the spoil along the channel after entered the spoil ground. The method can guarantee that the earthwork transport vehicle can drive normally in the spoil ground in rainy daysor can recovery work quickly after rain in the spoil ground to drive for discarding spoil, the ground pit construction is not seriously influenced in rainy season, the construction period is prolonged by short period, the fast construction of the ground pit earthwork can be realized in rainy season, and the engineering cost is reduced.