The invention discloses an automatic pipe-sticking machine, which comprises a stand on which a pipe outlet mechanism and a gummed paper sticking mechanism are arranged. An external guide pipe is output from the pipe outlet mechanism, and can be stuck and adhered to a product to be stuck with a pipe by gummed paper output from the gummed paper sticking mechanism. By arranging the pipe outlet mechanism and the gummed paper sticking mechanism, after the guide pipe is discharged by the pipe outlet mechanism, the gummed paper sticking mechanism can automatically strip off the gummed paper and stick the guide pipe onto the product by the gummed paper. The automatic pipe-sticking machine has an ingenious and rational structure, the fully automatic pipe sticking is realized, the labor intensity of workers is relieved, the production efficiency of pipe sticking is improved, and products subjected to pipe sticking are attractive and uniform; moreover, the automatic pipe-sticking machine is widely applied to working procedures for external packing of pipe sticking on the products in a production line.