The invention discloses a shield tunneling machine with a telescopic normal-pressure tool changing bin. The shield tunneling machine with the telescopic normal-pressure tool changing bin comprises a shield tunneling machine body and a tool disc body in transmission connection with a forward-moving end of the shield tunneling machine body, wherein the tool disc body is of a flat cylinder structure;five muck holes are formed in the end surface of the tool disc body at an equal angle; and a part located between each two adjacent muck holes, of the end surface of the tool disc body, is a tool clamping plate. According to the shield tunneling machine with the telescopic normal-pressure tool changing bin, a first fan-shaped shell body and a second fan-shaped shell body which are connected withthe shield tunneling machine body and telescopic are arranged in an area between the tool disc body and the shield tunneling machine body, and seal is arranged at the junction of the first fan-shapedshell body and the second fan-shaped shell body; in this way, when operating personnel carry out tool changing, a bin body sealed with the adjacent muck holes of the tool disc body, and the tool clamping plates is formed through the connection between the telescopic first fan-shaped shell body and second fan-shaped shell body, and the tool disc body, the operating personnel are facilitated to workunder a normal pressure while high-pressure support for a soil body is ensured; and meanwhile, the changing efficiency for a tool bit is increased, and the changing period is shortened.