In order to improve the accuracy of space docking platform,it' s necessary to analyze the errors and research the error calibration. Based on forward kinematics solution and inverse solution model,the kinematics error calibration model of 6-DOF parallel mechanism is established with total differential method. For the sake of identifying the value of each error more effective,a new error calibration method based on the genetic algorithm to search the optimal measuring points for calibration is proposed to re...