Abstract: The production and testing annealing treatments of Monel 401 tubes are introduced.The structure and properties of the as-cold-rolled Monel 401 tubes are analyzed，focusing on the influence of different annealing temperatures on the microstructure and mechanical properties of Monel 401 tubes.The analysis leads to the following conclusions.An as-cold-rolled Monel 401 tube has a fibrous structure，which will become more and more less when annealing temperature increases.At the annealing temperature of 700℃，a complete recrystallization happens and the fibrous structure disappears.When the annealing temperature rises from 550 to 600℃，the tensile strength，yield strength，hardness and elongation rate are basically the same.When the annealing temperature rises from 600 to 700℃，the tensile strength decreases slowly，the yield strength and hardness decreases rapidly，and the elongation rate also increases rapidly.When the annealing temperature is 650℃，a tube shows fairly good comprehensive properities and can meet the user’s requirements.