Abstract: A sand-proof sprinkler mechanism has a base. A housing and a connecting platform are provided on the base. A hose is rotatably connected between the housing and the connecting platform. The housing has a water outlet, a housing inner chamber and a water inlet that are in communication with the hose. The housing includes an impeller transmission member and a transmission device that is drivingly connected to the impeller transmission member and the hose. The housing further has a sealing chamber for mounting the transmission device. A water baffle is provided at an opening of the sealing chamber for covering the sealing chamber. The above structure prevents particles from entering and getting stuck.