Abstract: This paper,after revealing the problems existing in polynomial adjustment introduces the polynomial adjustment with collinearity condition(PACC) to improve the method used,and analyses the mathematic model of PACC,the structure and solution of its normal equation in detail.Finally,the experiment is undertaken by using this method with a group of practical data.The result shows that the method not only has the advantages of being simple in computation and requiring less memory,but also offers higher adjustment accuracy.