Photoelectric traverse is traverse measurement by total station, measuring the conjunction angle, turning angle and traverse length according to the code requirements,and getting each coordinate of traverse point by interior work calculation, as a basis for follow-up measurement work. At interior work calculating, angle closure error and coordinate increment closure error must not exceed the rule of one-level photoelectric traverse in relevant codes, then it can't adjust the closure. After analysis, there are some problems exists in the arithmetic of corrections of coordinate increment closure error,so a new computational method is presented, to further improve traverse measurement accuracy.