The spaceborne cloud radar is a quantitative active microwave remote sensing instrument,and calibration is the prerequisite and guarantee for achieving the quantitative application of spaceborne cloud radar.Therefore,research on calibration technology for spaceborne cloud radar is of great significance.Firstly,a brief introduction is given to the cali-bration principles and methods of spaceborne cloud measurement radar,including internal and external calibration meth-ods;then,the current development status of calibration technology for foreign spaceborne cloud measurement radars is emphasized,the in orbit calibration methods for foreign spaceborne cloud measurement radars are summarized,and the technical difficulties of active external calibration are proposed,which can provide reference for the calibration design of future spaceborne cloud radars in China.