Abstract: As is all know to us, Binhai New Area is on the Gulf of Bohai, the soil is relatively soft, requiring high bearing capacity for pile foundation of the tall buildings. In this case, post grouting technology of bored pile, which could improve the ultimate bearing capacity of single pile.Through the engineering examples, this text analyses placing reinforcement stress meters on the in-grouting piles and grouting piles, by comparing stress meter datas among the grouting piles and non grouting piles,we analyse friction resistance of pile-side and pile-tip was enhanced to a certain degree, which promote the post grouting pile technology in coastal soft soil area to a further application.