The invention provides a film mulching machine for garlic sprouts. The film mulching machine comprises a connecting truss, ploughs, an induced draft fan, a heat preservation film roll, a supporting rod, a linkage frame, a right-angle actuator, baffles, a spline shaft, a hollow concave plate, an air inlet, and a flow guiding groove, a convex plate, a heating plate, auxiliary rollers, linkage rods,earthing wheels and flow guiding teeth. The lower side, from one side to the other side, of the connecting truss is sequentially and fixedly connected with the ploughs, the induced draft fan, the supporting rods, the linkage frame and the right-angle actuator. As the outer edge of an opening of an air inlet is curved, the height difference between the convex plate and the air inlet is 0.3 cm, theconvex plate is located inside the air inlet with respect to the flow guiding groove and the gap between the convex plate and the air inlet is small, when the induced draft fan acts, the pressure of the airflow at the air inlet increases, the airflow under a film is accelerated and the pressure intensity under the film is reduced, so that the film is pressed down by the higher pressure above the film for better contact with the ground to prevent inflation between the film and the ground.