The invention discloses an integrated draining device. The device comprises a valve body, wherein a valve cover is arranged on the valve body and a housing space is formed in the valve cover; a first channel into the housing space from the valve body; a draining assembly, wherein the draining assembly comprises a piston cavity which is formed in the valve body and communicated with the housing space, a draining switch is arranged at the communication position of the piston cavity and the housing space, and a piston connected with the draining switch is arranged in the piston cavity; a starting assembly, wherein the starting assembly comprises a second channel and a floating ball accommodated in the housing space, the two ends of the second channel are respectively communicated with the housing space and the piston cavity, a starting switch is arranged at the communication position of the second channel and the housing space, and the floating ball is connected with the starting switch; the floating ball drives the starting switch to be opened and closed, and an opening communicated with the outer part of the integrated draining device is arranged on the part of the piston cavity near to the housing space. When a steam power system runs, the water can be automatically drained in time, and steam leakage can be prevented; the device is compact in structure and the space can be effectively saved.