The invention provides an animal husbandry veterinary surgery fixing device with a posture adjusting function, which comprises a base, a support rod and a placing table, the support rod is fixedly mounted above the base, the placing table is rotatably arranged above the support rod, and an adjusting mechanism and a limb fixing mechanism are respectively arranged above the base. The adjusting mechanism comprises electric telescopic rods A, grooves, electric telescopic rods B and an adjusting plate, the electric telescopic rods A are rotationally arranged on the two sides of the upper portion of the base, the number of the electric telescopic rods A on each side is three, and each electric telescopic rod A is rotationally connected with the containing table. By arranging the placing disc A, the fixing groove, the connecting belt A, the fixing sleeve, the air bag A, the clamping groove, the clamping block, the inflator and the push rod, the animal can be fixed according to the positions and the sizes of the four limbs of the animal, the fixing effect is better, meanwhile, blood circulation of the animal cannot be affected, and the using effect of the device is better.