The invention relates to a stage heating and extrusion controlling device for powder superalloy members and a using method. According to the using method, with the help of the deformation temperatureand pressure of stage change, the low-temperature and low-pressure curing and high-temperature and high-pressure controlling of powder materials at a time are realized. The method comprises the stepsthat firstly, powder is preliminarily cured under the conditions of lower temperature (no more than 700 DEG C) and lower pressure (no more than 500 MPa); then, the superalloy powder is completely densified by increasing the temperature (no more than 1000 DEG C) and combining plastic deformation parameters such as low extrusion ratio (no more than 2:1) and deformation speed, and a powder superalloyingot with certain deformation is obtained; and a microstructure with the grain size being 7-13 levels can be obtained by further increasing the temperature (no more than 1100 DEG C) and combining plastic deformation parameters such as larger extrusion ratio ((4:1)-(9:1)) and deformation speed. The integration of solidification-control of the powder superalloy members is achieved, the technological process is simplified, the development cycle is shortened, the material utilization rate is improved, and the manufacturing cost of the members is reduced.