Combined tunnel engineering excavation construction rack

The utility model discloses a combined tunnel engineering excavation construction rack which comprises a plurality of electric telescopic rods, the top ends of the electric telescopic rods are in threaded connection with connecting sleeves, mounting rods are connected to the top ends of the connecting sleeves in an inserted mode, an end face protection frame or a side face protection frame is rotationally connected between every two adjacent mounting rods, and inserting rods are connected to the top ends of the mounting rods in an inserted mode. And the top ends of the inserting rods are connected with a top frame in a sleeving mode, connecting rods are connected between every two adjacent electric telescopic rods through threads, connecting rods are connected between every two adjacent connecting sleeves through threads, supporting rods are installed between every two opposite electric telescopic rods through screws, and pedals are connected to the outer portions of the connecting rods in a hanging mode. The