The invention discloses a postpartum protection nutrient solution, a preparation formula and a preparation method. The postpartum protection nutrient solution has the beneficial effects that ginseng and radix astragali preparata have the effects of reinforcing vital energy, consolidating the root, strengthening the body resistance, promoting salivation and nourishing blood; angelica sinensis has the effects of replenishing blood, promoting blood circulation, relieving pain and tonifying qi and blood; salvia miltiorrhiza has the effects of promoting blood circulation, removing blood stasis, nourishing the blood and tranquilizing the mind; herba leonuri has the main effects of promoting blood circulation, removing blood stasis, dredging blocking, discharging lochia, promoting uterine contraction and removing blood stasis after delivery; the herba patriniae has the effects of clearing away heat and toxic materials, eliminating carbuncle and expelling pus, stasis removing and pain relieving, and the medicines are used together, so that various symptoms of female pets after delivery can be prevented, conditioned and treated. The postpartum protection nutrient solution is used for postpartum repair of pets, dogs and cats, and has the effects of replenishing blood, relieving pain, promoting blood circulation, removing blood stasis, preventing hysteritis caused by placenta residue and reducing the risks of postpartum bacterial infection and infection of puppies and cats on a series of symptoms such as fatigue, weakness, thirst, prolonged lochia of birth canals and even fever caused by postpartum vital qi weakness, qi and blood deficiency, blood deficiency and blood stasis, mastitis is prevented, and the vigor of the babies is improved.