Disclosed are a method for controlling water level detection in a soda water tank, and a soda water machine. The method for controlling water level detection in a soda water tank comprises the following steps: determining whether a controller receives a water outflow instruction (S10); if so, the controller controlling the powering on of a water level probe assembly (S20); and if not, the controller controlling the powering off of the water level probe assembly (S30). The present invention can improve the service life of a water level probe assembly and avoid the failure of the water level probe assembly.