In multi-plane constraint measurement model of workspace measuring and positioning system,the horizontal rotation angle of transmitter is the only observation.In order to estimate the survey performance of the horizontal rotation angle,a mathematical transformation model is established based on the geometric properties of rotating laser planes,and the relationship between the standard deviation of horizontal rotation angle and the horizontal test angle is educed.Then,a verification method is proposed utilizing the precision polygons and collimator as a means of adjustment and the angle measured by a serrated-tooth indexing table as the reference angle.Experiments have been done using the platform,of which the results show that the uncertainty of the rotation angle measurement is 2.4"(99.73% confidence probability).This verification method is universally applicable to test the measurement performance of angle generated from pivoting around stationary axis.