The utility model relates to a special calf -puller of milk cow, including the practise midwifery drag, practise midwifery handle, practise midwifery pull rod and two practise midwifery chains, the practise midwifery drag with practise midwifery handle fixed connection, the practise midwifery pull rod with practise midwifery handle swing joint, the practise midwifery chain is geted in touch and practise midwifery pull rod swing joint through two on the practise midwifery pull rod respectively, and two practise midwifery chain both ends distances equal to be connected with a traction type dynamometer on one of them practise midwifery chain. The utility model provides a special calf -puller of milk cow, pulling force in the time of can quantifing artifical practise midwifery makes the staff when the operation, can learn at any time to act on calf pulling force on one's body to when the pulling force reaches the certain degree, in time stop the practise midwifery, select the cesarean deliery, guarantee that the calf that gives birth to is healthy, be favorable to the postpartum recovery of cow simultaneously.