The invention relates to a core shooter with an automatic sand removing mechanism in the technical field of the core shooter. The core shooter comprises a guide rail installed on a rack and rotatably connected to a sand shooting mechanism and a gas blowing mechanism which are capable of reciprocating sliding, and a sand shooting mould is installed below the guide rail; the sand shooting mechanism and the gas blowing mechanism reciprocating sliding along the guide rail are staggered above the sand shooting mould for sand shooting to the sand shooting mould and catalyst lead-in through gas blowing. The core shooter is characterized in that the sand removing mechanism is slidably connected to the guide rail between the sand shooting mechanism and the gas blowing mechanism; in the process that the sand shooting mechanism slides along the guide rail and leaves above the sand shooting mould upon completion of sand shooting to the sand shooting mould, the sand shooting mechanism slides gradually above the sand shooting mould along the guide rail, and loose sand on the surface of the sand shooting mould is removed through pressure airflow. In the sand shooter provided by the invention, automatic and continuous implementation of sand shooting, sand removing and gas blowing can be achieved, and the sand shooting efficiency and sand shooting quality are improved.