Multifunctional flat guide

The invention relates to a multifunctional parallel adit, which belongs to the technical field of tunnels and comprises a tunnel body arranged along the extension direction of a main tunnel. A pavement cover plate is arranged in the hole body to divide the hole body into an upper channel and a lower channel which are arranged up and down; the upper channel is used for ventilation and personnel evacuation; the lower channel is used for draining water and is communicated with a karst pipeline of the tunnel; the hole body is divided into an air duct branch hole and a drainage branch hole close to the hole opening of the main hole; the air duct branch hole extends upwards to a wide terrain position or is connected into a tunnel fan room; a safety channel and a drainage channel which are communicated with the upper channel and the lower channel of the tunnel body respectively are arranged in the drainage branch tunnel, the drainage channel is connected into a tunnel opening drainage system of the main tunnel, and