The main feature of the double socket type elastic seat sealing gate valve is that two sockets are arranged at both ends of the valve, and the socket is connected with the pipe, that is, the pipe is directly inserted into the socket, which is extremely convenient to install, and the rubber sealing ring is placed between the pipe and the socket to achieve seal. This connection is different from the flange connection, called flexible connection or stress-free connection, which has the advantage of allowing the pipe to have an appropriate amount of expansion and expansion at the connection with the socket, which can compensate for the change in the length of the pipe, and can eliminate the material stress caused by thermal expansion and cold contraction of the pipe to achieve the purpose of protecting the pipe.