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The paper designed a new drive and control system of 4-quadrant converter for traction shearer according to index requirements of 4-quadrant converter of shearer, and introduced design of hardware circuit and software implementation of the system. The field experiment results show that the system realizes fast braking of shearer, provides continuous braking force for shearer, and improves control performance and reliability of traction operation for shearer, which has good popularization value for engineering applications.