The utility model relates to the technical field of
medical instruments, in particular to an
injector and an automatic propelling device thereof, the automatic propelling device comprises a shell, a propelling
assembly and a control
assembly, a buckle connected with the
injector is arranged on the shell, and a through hole for the
injector to penetrate through is formed in the end, close to the buckle, of the shell. The propelling
assembly comprises a driving piece, a connecting plate and a lead screw which are installed in the shell, the driving piece is located at the end, away from the buckle, of the shell, one end of the lead screw is rotationally connected with the end, close to the buckle, of the shell, and the other end of the lead screw is connected with the driving piece. When the driving piece drives the lead screw to rotate, the connecting plate is driven to slide in the shell and push the injector to inject
medicine; the control assembly comprises a
control switch and a circuit board, the circuit board is arranged in the shell, and the
control switch is electrically connected with the driving piece through the circuit board so as to control the driving piece to work.