Provided is a dyeing machine cloth sampling device. A dye liquor inlet pipe and a dye liquor outlet pipe are arranged on a sampling tank, a dye liquor inlet solenoid valve is installed on the dye liquor inlet pipe, a dye liquor outlet solenoid valve is installed on the dye liquor outlet pipe, the dye liquor inlet pipe is communicated with a dye liquor nozzle pipe of a dyeing machine, and the dye liquor outlet pipe is communicated with a cylinder body of the dyeing machine. A cooling pipe is provided with a cold water inlet pipe section and a cold water outlet pipe section, a cold water inlet solenoid valve is installed on the cold water inlet pipe section, a cold water outlet solenoid valve is installed on the cold water outlet pipe section, the cooling pipe is arranged in the sampling tank, and the cold water inlet pipe section and the cold water outlet pipe section are located outside the sampling tank. When the dyeing machine cloth sampling device is used for sampling dyed cloth, it is not needed that sampling is carried out after dye liquor in the dyeing machine is cooled; if it is needed to add pigment for dyeing, a lot of energy can be saved, production cost can be reduced, and production efficiency can be improved.