Abstract: In recent years, viscoelastics has been widely applied to a series of ophthalmic surgeries, and meanwhile, there are deeper studies on selection and utilization of viscoelastics of the different type, and moreover numerous new surgical techniques spring up around the application of viscoelastics. In terms of cataract surgery, techniques by using the combination of different type of viscoelastics are put forward, such as soft shell technique, ultimate soft shell technique, tri\|soft shell technique, besides, appropriate selection and application of viscoelastics can improve the safety and convenience of operation in intraoperative floppy iris syndrome, capsulorhexis in pediatric cataract surgery, intraoperative posterior capsule rupture. In terms of glaucoma surgery,  viscoelastics can be used to treat flat anterior chamber after trabeculectomy, and apply it to viscocanalostomy. In terms of corneal transplantation surgery, viscoelastics can protect corneal endothelial cells effectively during donor's corneal harvesting and penetrating keratoplasty, besides, it has unique application in lamella keratoplasty and endothelial keratoplasty. In terms of vitreoretinal surgery,  viscoelastics can be used to protect retina from iatrogenic injuries during macular hole surgery or removal of posterior segment foreign bodies.