Composite double-shield tunnel boring machine

The utility model discloses a composite double-shield tunnel boring machine, which comprises a cutter head, a front shield, a people cabin, a main driver, an inner and outer extending and retracting shield, a main pushing system (in V-shaped arrangement), a hinging system, a support shield, a support shoe system, a tail shield, an auxiliary pushing system, a double-mode slag discharge system, an integrated support system and the like. The four work modes including a double-shield (support shoe and pipe piece lining) work mode, a double-shield (support shoe and anchor spraying support) work mode, a single-shield work mode and an EPB work mode can be realized, and efficient tunnel boring, slag discharge and supporting are realized under the hard rock, sand and soft soil geological conditions. The tunnel boring machine has the following obvious characteristics that the double-shield tunnel boring machine in such a type can realize the effect that a single piece of equipment can be applicable to the tunnel boring construction requirements of various complicated geological conditions, the geological applicability of the tunnel boring machine is greatly improved, the frequency for replacing the tunnel boring machine in the tunnel construction is reduced, and the production efficiency is greatly improved.