The invention discloses a swing-amplitude-adjustable baby hammock which comprises a base, a transmission adjusting structure, a driving structure, a driven structure, a baby hammock body, a protectionstructure and two driving sliders. The swing-amplitude-adjustable baby hammock has the advantages that a baby bed can be automatically swung, a baby is comforted to fall asleep, the baby hammock relieves burden of an adult for soothing the baby to fall asleep, swing amplitude can be adjusted according to actual situations such as age and body weight of a baby, so that sleep of the baby is more comfortable, the transmission adjusting structure is fixedly connected at the left end of the base, left ends of the two driving sliders are slidably connected on the base, the right ends of the two driving sliders are fixedly connected with the driving structure, the transmission adjusting structure is slidably connected in the two driving sliders, the driving structure is slidably connected on thebase, the right end of the driving structure is hinged to the baby hammock, the right end of the baby hammock is hinged to the driven structure, the driven structure is slidably connected on the base, and the protection structure is inserted into the left end of the base.