Water-filling-type cool and warm bed mattress

The utility model relates to a water-filling-type cool and warm bed mattress, which comprises a water outlet pipe joint, a bed mattress, a water inlet pipe joint, a computer module and a water level observation hole. The side surfaces and the bottom surfaces of a bed mattress body are in dual-layer high-strength polyvinyl chloride (PVC) structures to preserve heat. A water inlet pipe is connected with a cold and hot water tap, hot water in a solar water heater is only required to be filled into the bed mattress body, the water level is adjusted through the water level observation hole, the bed mattress body becomes hot at the moment and sponge and a cotton quilt on a bed become warm; on rainy or cloudy days, water is filled into the bed mattress body, a power switch in the computer module is turned on and the water in the bed mattress body is heated by an electric heater; when the electric heater is used, since a temperature control switch is installed in the computer module, the electric heat is automaticall