Development and construction W band ground-based long-range high-resolution imaging radar has great significance. It can satisfy the needs of carefully observation of space target morphological characteristics. Thus the ability of radar high resolution imaging of our country can be improved. The current situation is analyzed. The main technical indicators and technical features of W band radar are list. The frequency band character of W band is analyzed， which contains remote detection power， high resolution， high angle resolution and measurement accuracy， high relief of echo scattering property and so on. On this basis， the main plan points of our W band high-resolution imaging radar are proposed by referring to the technical feature of W band radar abroad. The points include broadband high power gyro traveling wave tube， beam waveguide antenna feeder， receiver， high speed data collector and memory， high reliability target acquisition and high resolution imaging technology and so on. Then the key technology and its domestic basis is analyzed related to the points above. In addition， the suggestion of primary research direction is proposed.