The utility model discloses a non -maintaining sediment bottle, it includes the bottle of being made by transparent organic glass material, the air inlet, the guide wire, the drain pipe, the gas outlet, an unidirectional valve, needle and stainless steel floater, air inlet and gas outlet branch are put in the bottle both sides, the guide wire is the lower part with the air inlet intercommunicationand in extending to the bottle, the drain pipe is established at bottom of the bottle, upper portion in the bottle is established to the check valve, the exit end and the gas outlet intercommunication of check valve, the inside wedge -shaped opening that is formed with of entry end, still be equipped with a guide block in the inlet channel of check valve entry end, be formed with a plurality of air vents that run through the setting from top to bottom on the guide block, the needle upper end is passed the guide block and is extended to the wedge -shaped opening below, the lower extreme is connected with the stainless steel floater, and the upper end of this needle still is formed with the wedge, needle guide block relatively reciprocates, wedge -shaped opening is lived in the lucky shutoff of wedge when the needle shifts up to the biggest position. The utility model discloses it is difficult broken, but automatic drainage, and the security is high.