Based on the TS13 section of the Taizhou Bay Bridge and its connection project in Zhejiang Province,the effect of the transition from the abutment to the common section was studied. Field tests were conducted to study the soft foundation treatment scheme with variable length of pipe pile and combination of pipe pile and cement mixing pile. It is found that the smooth transition from abutment to the common section can be realized by controlling the change of pile length. Setting reasonable length and space between pipe pile and cement mixing pile,or increasing the length of transition section,can offer a smooth transition between the treatment section of pipe piles and cement mixing piles in the soft foundation treatment of pipe pile and cement mixing pile.