Inflation and deflation device and pet neck guard ring

The utility model provides an inflation and deflation device and a neck protection ring, and relates to the technical field of pet wearing supplies, and the inflation and deflation device comprises a pressing body and a pressing inflation assembly. An inflation cavity is formed in the pressing body, the pressing inflation assembly is connected with the pressing body, an air inlet channel, an inflation channel and an exhaust channel are formed in the pressing inflation assembly, and the pressing body can elastically deform to drive air in the inflation cavity to be exhausted out of the pressing body through the inflation channel. The pressing body can automatically reset, so that negative pressure is formed in the inflation cavity, and air outside the pressing body is driven to flow into the inflation cavity through the air inlet channel. The two ends of the exhaust channel can communicate with the exterior of the pressing body at the same time, and part of the exhaust channel is located in the air inlet chann