The invention belongs to the field of flameless burners, and particularly discloses a hydrogen-vapor oxygen-rich flameless burner. A hydrogen spraying pipe is connected with a burning chamber. A firstvapor spraying pipe sleeves the outer side of the hydrogen spraying pipe and is connected with the burning chamber and used for spraying vapor to the burning chamber at the preheating stage. A primary air spraying pipe sleeves the outer side of the first vapor spraying pipe and is connected with the burning chamber and used for spraying primary air to the burning chamber at the preheating stage.A secondary air spraying pipe is connected with the burning chamber and used for spraying secondary air to the burning chamber at the flameless burning stage. The burning chamber is used for providingspace for oxygen-rich burning of the hydrogen. According to the hydrogen-vapor oxygen-rich flameless burner, the primary air and the hydrogen are separated through the vapor, the burning rate of thehydrogen can be effectively reduced, and therefore the safety of the burner is improved; after the preset temperature is reached, the secondary air spraying pipe is switched to provide the oxygen to achieve flameless burning of the hydrogen, and it can be guaranteed that the temperature in the burner is evenly distributed; and therefore potential safety hazards generated by hydrogen burning are avoided.