A one-way valve , comprising: a valve body , having an inner cavity ; a first pipeline arranged on the valve body , wherein, one end of the first pipeline communicates with the inner cavity and the other end of the first pipeline is configured to be connected to an air pump; a second pipeline arranged on the valve body , wherein, one end of the second pipeline communicates with the inner cavity and the other end of the second pipeline is configured to be connected to a spray bubble interface of a pool; and a third pipeline arranged on the valve body , wherein, one end of the third pipeline communicates with the inner cavity and the other end of the third pipeline is configured to be connected to an inflating interface of the pool; wherein when the air pump is in an activated state, the second pipeline is in a communicating state and supplies air to the spray bubble interface, and the third pipeline is in a communicating state and supplies air to the inflating interface; and a first sealing member is arranged in the second pipeline , and the first sealing member is configured to make the second pipeline conducted under an action of air pressure and seal the second pipeline after pressure relief, characterized by a fourth pipeline arranged on the valve body , wherein a second sealing member is arranged in the valve body , and the second sealing member configured to seal the fourth pipeline under the action of air pressure and make the fourth pipeline conducted after pressure relief or when water is flowing back from the pool, and in that when the air pump is in an activated state, the third pipeline is in a communicating state with the inner cavity through the second sealing member . a valve body , having an inner cavity ; a first pipeline arranged on the valve body , wherein, one end of the first pipeline communicates with the inner cavity and the other end of the first pipeline is configured to be connected to an air pump; a second pipeline arranged on the valve body , wherein, one end of the second pipeline communicates with the inner cavity and the other end of the second pipeline is configured to be connected to a spray bubble interface of a pool; and a third pipeline arranged on the valve body , wherein, one end of the third pipeline communicates with the inner cavity and the other end of the third pipeline is configured to be connected to an inflating interface of the pool; wherein when the air pump is in an activated state, the second pipeline is in a communicating state and supplies air to the spray bubble interface, and the third pipeline is in a communicating state and supplies air to the inflating interface; and a first sealing member is arranged in the second pipeline , and the first sealing member is configured to make the second pipeline conducted under an action of air pressure and seal the second pipeline after pressure relief, characterized by a fourth pipeline arranged on the valve body , wherein a second sealing member is arranged in the valve body , and the second sealing member configured to seal the fourth pipeline under the action of air pressure and make the fourth pipeline conducted after pressure relief or when water is flowing back from the pool, and in that when the air pump is in an activated state, the third pipeline is in a communicating state with the inner cavity through the second sealing member . <EOS>