Multiple-stage treatment gas washing device

The invention provides a multiple-stage treatment gas washing device, and relates to the technical field of environmental protection equipment. The multiple-stage treatment gas washing device comprises a device main body; the device main body comprises a first stage purification device, a second stage purification device and a third stage purification device; the first stage purification device comprises a primary box; a gas inlet pipe is arranged in the primary box in a penetrating way; a piston device is arranged in the gas inlet pipe in a penetrating way; one end of the gas inlet pipe passes through the primary box and extends into the primary box; the bottom end of the gas inlet pipe is fixedly connected with a spherical pipe; a communicating pipe is arranged at the bottom of the outersurface of the spherical pipe in a penetrating way; the right side of the first stage purification device is fixedly connected with the left side of the second stage purification device. The multiple-stage treatment gas washing device is provided with the first stage purification device, the gas inlet pipe, the spherical pipe and the communicating pipe, and gas sequentially passes through the spherical pipe and the communicating pipe after being introduced into the first stage purification device, and is then fully contacted with water in the primary box, so that the gas is subjected to firststage purification.