Method for measuring and setting direction turning point pile under condition that an intersection point pile is not visible in line engineering

The invention discloses a method for measuring and setting a direction turning point pile under the condition that an intersection point pile is not visible in line engineering, which comprises the following steps of: quickly determining the turning point pile between two adjacent intersection point piles which are not visible to each other by adopting a total station free setting method and utilizing coordinate measurement and construction lofting functions of a total station. The method is characterized by comprising the following steps of: erecting a total station at any point which can be communicated with two intersection piles, measuring virtual coordinate values of the two intersection piles by using a coordinate measuring function of the total station by adopting a free station setting method, and acquiring virtual coordinate values of two temporary points of which connecting lines on a ridge line can be intersected with the two intersection piles; and an intersection point, namely a virtual coordinat