The invention discloses a corner kick training system in the football field. The corner kick training system comprises a training cage, a training ground, goals, ball machines, conveyor belts, a control box and an analysis system. An access door is arranged at the front end of the training cage, the control box is arranged on the outer side of the training cage, the ball machines are arranged on two sides of the front end of the training ground, the opposite goals are arranged on two sides of the rear end of the training ground, ball ditches are arranged on the ground below the goals, the conveyor belts are arranged below the ball ditches, the ball machines comprise ball grooves, shells, rotary tables, squeezing heads and motors, the squeezing heads are flat columnar elastic bodies, irregular cambered surfaces are arranged on the side surfaces of the squeezing heads, a barrier is arranged on a side of each ball groove, and air cylinders are connected with the barriers. The corner kick training system has the advantages that balls transmitted from the ball machines can be in diversified camber and height forms, and the response ability and techniques of players can be exercised; coaches can guide the players according to video playback at any time, accordingly, training effects can be improved, and the corner kick training system is high in training efficiency; two persons can be simultaneously trained by the aid of the corner kick training system, trouble due to manual ball picking can be prevented, and accordingly the training efficiency can be improved.