A novel fodder stacking mechanical arm adopting servo motors to drive a multi-freedom-degree connecting rod mechanism comprises a base 9, a first driving rod 1, a second driving rod 2, a third driving rod 3, a third connecting rod 4, a fourth connecting rod 7, a first connecting rod 5, a big arm 6, a wrist 20, a pawl 8 and a servo drive device. One end of the big arm 6 is connected with the fourth connecting rod 7 through a ninth rotation pair 19, and the other end of the big arm 6 is connected with the pawl 8 through the wrist 20. The servo drive device comprises the first servo motor, the second servo motor and the third servo motor, all of which are connected with the first driving rod 1, the second driving rod 2 and the third driving rod 3 correspondingly so as to drive the first driving rod 1, the second driving rod 2 and the third driving rod 3 to rotate. The first driving rod 1, the second driving rod 2 and the third driving rod 3 jointly conduct driving to finish the big arm ascending and descending, pitching of the wrist 20 and other movements, and the fodder stacking work of the pawl 8 is achieved. According to the novel fodder stacking mechanical arm, the motors are arranged on the base, and the problems that an arm of an open chain mechanism is heavy, and the dynamic performance is poor are solved.