An accurate measurement method based on continuous wave（CW） radar for two-dimensional（2 D）motion track of target is proposed.On the basis of existing radial displacement and azimuth measurement

deduces transversal displacement measurement method and theoretic precision of correlative motion parameters by building geometric model

2 D motion track measurement of target is realized.Swing track of close range simple pendulum is measured

and the result accords with kinematics regularity

measurement precision of radial displacement and transverse displacement are 12 μm and 2.2 mm

respectively

verify the effectiveness and accuracy of the method.This method has good potential application value in movement parameters measurement and track analysis of close range target.