Oral cavity opening device special for children for stomatology department

The invention provides an oral cavity opening device special for children for the stomatology department, and relates to the technical field of medical instruments. According to the scheme, the oral cavity opening device special for children for the stomatology department comprises an oral cavity opening assembly and a control assembly used for controlling the oral cavity opening assembly; the oral cavity opening assembly comprises a first connecting piece, and the two ends of the first connecting piece are rotationally connected with first opening pieces; and the control assembly comprises an opening rod, the opening rod penetrates through the first connecting piece, the opening rod is in threaded fit with the first connecting piece, one end of the opening rod is rotationally connected with a second connecting piece, the two ends of the second connecting piece are connected with second opening pieces, and the ends, away from the second connecting piece, of the second opening pieces are slidably connected wit