An exhaust assembly for an aerostat, comprising a valve base provided with a valve port , and a valve cover that selectively covers the valve port , and further comprising: a motor driving mechanism and a transmission mechanism that are arranged on the valve base , wherein the motor driving mechanism propels the transmission mechanism to drive the valve cover to selectively cover the valve port , wherein when the valve cover is in a position where the valve port is open, the valve cover is arranged at an angle with respect to a plane at which the valve port is located, wherein when the valve cover is in a position where the valve cover covers the valve port , a plane at which the valve cover is located is parallel to the plane at which the valve port is located; and when the valve cover is in the position where the valve port is open, a plane at which the valve cover is located is vertical to the plane at which the valve port is located, wherein the motor driving mechanism comprises a motor , and the motor has an output shaft that is connected to the transmission mechanism, wherein the transmission mechanism comprises: a shifting fork that is connected to the output shaft and that rotates when driven by the output shaft ; a first interlocking shaft that is slidably arranged in a guide slot of the shifting fork , wherein the first interlocking shaft is connected to the valve cover by using a connection shaft ; a sliding slot that guides the first interlocking shaft to drive the valve cover to switch between the opening location and the covering location; and a second interlocking shaft that is associated with the first interlocking shaft , wherein the second interlocking shaft is arranged between the first interlocking shaft and the valve cover , wherein the connection shaft that connects the first interlocking shaft and the valve cover extends through the second interlocking shaft , wherein the second interlocking shaft is slidably disposed in the sliding slot . a motor driving mechanism and a transmission mechanism that are arranged on the valve base , wherein the motor driving mechanism propels the transmission mechanism to drive the valve cover to selectively cover the valve port , wherein when the valve cover is in a position where the valve port is open, the valve cover is arranged at an angle with respect to a plane at which the valve port is located, wherein when the valve cover is in a position where the valve cover covers the valve port , a plane at which the valve cover is located is parallel to the plane at which the valve port is located; and when the valve cover is in the position where the valve port is open, a plane at which the valve cover is located is vertical to the plane at which the valve port is located, wherein the motor driving mechanism comprises a motor , and the motor has an output shaft that is connected to the transmission mechanism, wherein the transmission mechanism comprises: a shifting fork that is connected to the output shaft and that rotates when driven by the output shaft ; a first interlocking shaft that is slidably arranged in a guide slot of the shifting fork , wherein the first interlocking shaft is connected to the valve cover by using a connection shaft ; a sliding slot that guides the first interlocking shaft to drive the valve cover to switch between the opening location and the covering location; and a second interlocking shaft that is associated with the first interlocking shaft , wherein the second interlocking shaft is arranged between the first interlocking shaft and the valve cover , wherein the connection shaft that connects the first interlocking shaft and the valve cover extends through the second interlocking shaft , wherein the second interlocking shaft is slidably disposed in the sliding slot . <EOS>