Sealing strips for doors and windows are mostly in the form of soft and hard co-extrusion composite, which can meet the hardness of the strip positioning itself and achieve good soft sealing of component coordination, reaching automobile grade materials. Some sealing strips are provided with equal pressure holes to achieve better sealing effect. The structural design of the sealing strip is very important. The excellent scheme design can effectively solve the problems of air leakage and water leakage of doors and windows and increase the service life of doors and windows;