Connecting device for drainage pine pile and vacuum filter pipe

The utility model discloses a connecting device of a drainage pine pile and a vacuum filter pipe, which comprises a connecting box, a space for transmitting vacuum degree and water passing is arranged in the connecting box, a connector used for being connected with the vacuum filter pipe is arranged on the connecting box, an opening is arranged at the bottom of the connecting box, and a cylindrical spring device is arranged in the opening. Insertion grooves allowing drainage pine pile drainage structures to enter are reserved between the cylindrical spring devices, the connectors and the insertion grooves are communicated with the inner space of the connecting box, and sawtooth-shaped barbs are arranged at the tails of the insertion grooves. The drainage pine pile and the vacuum filter pipe can be connected, the drainage pine pile and the vacuum filter pipe are fully combined, and the advantages of the drainage pine pile and a vacuum preloading method are fully exerted in the construction process. And the hol