The invention provides a tension detection machine for leather, and belongs to the technical field of leather manufacture devices. The tension detection machine for leather solves the problems of the existing tension detection machine for the leather that the fixing and stretching direction of the leather is out of alignment during the tension detection period, the stress is uneven, and the tension detection data lacks semantic precision. The tension detection machine for leather comprises a rack and a tension sensor, wherein a clamping mechanism 1 and a clamping mechanism 2 are arranged on the rack; the rack is connected with a sliding plate in a slipping manner, the clamping mechanism 2 is arranged on the sliding plate, and the sliding plate is connected with a power mechanism; a horizontal fine tuning mechanism is arranged between the adjusting plate and the sliding plate, and an angle fine tuning mechanism is arranged between one end of a lower clamping rod 2 and the adjusting plate. The tension detection machine for the leather enables the leather to be evenly stressed during the tension detection period and can obtain exact measure data.