门环是民居大门门扇上环状金属环扣,也有的地方称作“铺首”。它最直接的作用就是供人开拉门和敲门,但由于它是大门上的焦点,具有画龙点睛的作用,因而门环的装饰意义得到了强化,又由于大门是民居的进出口,所以传统上人们总把门环的底座设计成一个怪兽,具有驱赶妖魔鬼怪和镇宅的象征意义,于是出现了千奇百状的门环,而怪兽衔环是主流。在广州出土的汉代明器中,就有几间房屋,共中有一扇门 Knocker door is a residential door ring metal ring buckle, also known as Its most direct role is to open the door for people and knock on the door, but because it is the focus of the door, with the finishing touch, so the meaning of the door knocker has been strengthened, but also because the door is the import and export of residential, so traditionally People always design the base of the door knocker as a monster, which has the symbolic meaning of driving the demons and the town house, so that the curious door knocker appears, and the monster title ring is the mainstream. In the Ming Dynasty unearthed in Guangzhou Ming Dynasty, there are several houses, a total of a door