The disclosure relates to the technical field of animal supplies and particularly discloses an outdoor pet drinking apparatus. The outdoor pet drinking apparatus comprises a bottle cap and a drinking bowl. A water outlet is provided at a top end of the bottle cap. The drinking bowl is fixed to the bottle cap. The drinking bowl is made of an elastic material. When it is necessary to use the drinking bowl, the drinking bowl is turned away from the bottle body to form a bowl shape. The drinking bowl is further provided with a cover or a bottle plug, which is connected to the drinking bowl and configured to cover the water outlet of the bottle cap. The drinking apparatus in the disclosure is convenient to carry outdoors so as to water or feed a pet, and the apparatus is simple to use, sanitary, and high in practicality.