In order to solve the fracture of single point incremental forming parts due to uneven thining,the static pressure support was introduced into the forming process.Firstly,the mechanism of static pressure support-single point incremental forming was analyzed and the parts were divided into regions according to the degree of thining.Then,the law of thining rate change in different regions under different static pressure conditions was studied by simulation.Finally,the static pressure support-single point incremental forming experimental platform was built to verify the simulation results.The results show that the thining rate of region II increases along the node path and reaches the maximum at 37.5 mm away from the edge of the sheet metal.With the increase of the forming depth,the thining rate decreases slightly in the middle of region II and increases again near the bottom.The thining rate decreases with the increase of static pressure parameters,and the error between experimental results and simulation results is less than 5%.Compared with single point incremental forming,this technology can improve and control the uniformity of the thickness of parts effectively,delay or avoid the fracture of parts.