The utility model discloses a coil focusing traveling wave tube with an integrated structure, comprising an electronic gun (1), a slow wave circuit (2), a collector (3), a collector drum (4), an input waveguide (5) and an output waveguide (6), wherein a cooling loop is formed among a water jacket (7) at the periphery of the slow wave circuit (2), the external surface of the slow wave circuit (2) and the internal surface of the water jacket (7); coils (8) are fixed at the periphery of the water jacket (7) at interval; a cooling liquid outlet hole is arranged on the water jacket (7); a non-magnetic-permeability baffle (9) made of copper-nickel alloy is fixed on the water jacket (7); a lead drum (10) is fixed at the upper end of the baffle (9); a shielding drum (11) is sheathed outside the coils (8); one end of the shielding drum (11) is provided with a cooling liquid inlet hole (12); and another cooling liquid outlet hole (13) is arranged on the collector drum (4). The coil focusing traveling wave tube with the integrated structure provided by the utility model has the advantages that the structural design of the cooling loop is reasonable, integrated cooling of the slow wave circuit, the coils and the collectors can be realized, the working stability is strong, and the requirement for high-power working can be met.