Abstract: An initial research has been made on the relations between the magnetic properties of gas-atomized NdFeB powder and the technological parameters of heat treatment including tempering temperatures,holding time,tempering atmosphere,cooling mode,etc and particle sizes.Technological conditions have been optimized.The powder as-tempered has superior properties,approximating to a level of practical use.Gas-atomized NdFeB powder is expected to be the raw materials for bonded magnets.