The coal gas burner consists of steel platforms, bridged supporting beam, gas main, gas branches, burner and flexible non-metal pipe connected to gas source in the workshop. The flexible non-metal pipe is provided with quick changed unions on two ends, the gas main is connected to the flexible non-metal pipe via the quick changed union, and each of the gas branches has one end connected to the gas main through one rigid pipe and the other end connected to the burner through one upwards bent flexible metal pipe. The present invention has saving in energy, convenient hoisting and other advantages.