<p>Provided is a novel detonation flame spraying device which can perform stabilized detonation flame spraying using hydrogen fuel. A detonation flame spraying device wherein stabilized pulse detonation can be achieved with a short DDTL by injecting hydrogen and oxygen opposite to each other into a sub-combustion chamber, and partitioning the sub-combustion chamber and a main combustion chamber having a spiral rib formed on the inner wall by means of a partition in which a plurality of through holes are formed. Furthermore, high frequency operation is achieved while ensuring heat required for melting a flame spraying material by distributing flammable gas supply ports to the rear ends of the sub-combustion chamber and the main combustion chamber, and spraying efficiency is enhanced by employing a mechanism for supplying a flame spraying material intermittently along with hydrogen fuel.</p>
