The invention discloses the components and preparation method of beta-
lactam injection. The beta-
lactam injection comprises 5 to 20 percent of beta-
lactam antibiotics, 0.05 to 5 percent of suspending agent, 0.005 to 0.3 percent of antioxygen, 0.1 to 0.2 percent of
nonionic surfactant and the balance of
vegetable oil or
grease for injection. The injection can be used for preventing and curing animal
bacterial infectious diseases and can be injected hypodermically or in
muscle and be applied through breast for a few times. The preparation method provided by the invention comprises: firstly, making the
antibiotics and the antioxygen into micro
powder and making the suspending agent into
fine powder; secondly, adding the
vegetable oil or
grease for injection, which is sterilized at high temperature, into the
fine powder of the suspending agent, heating the mixture, uniformly mixing the mixture and keeping the mixture in a
sterile environment to cool the mixture to
room temperature for later use; and finally, transferring the prepared oil or
grease added with the suspending agent to a
colloid mill, adding medicament micro
powder, the antioxygen and the non-ionic surfactant with stirring, and performing uniform mixing and sterilization to obtain the beta-lactam injection.