The invention relates to an evaporator which comprises evaporating pipes, a first fin group, a second fin group, a liquid storage barrel, a first copper aluminum pipe and a second copper aluminum pipe. The evaporator is characterized in that the evaporating pipes are in a bending spiral shape, one end of each evaporating pipe is directly connected with one end of the first copper aluminum pipe, the other end of the first copper aluminum pipe is connected with a transition pipe, the other end of each evaporating pipe is connected with one end of the liquid storage barrel, the other end of the liquid storage barrel is connected with the second copper aluminum pipe, a deforming pipe is arranged in the liquid storage barrel, one end of the deforming pipe is fixedly connected with one end, connected with each evaporating pipe, of the liquid storage barrel, each evaporating pipe is connected with the first fin group in a clamping mode, the second fin group is arranged on one side where the liquid storage barrel is placed and is connected with at least four evaporating pipes in a clamping mode, fins of the second fin group and the first fin group are arrayed in a gap-staggering mode, hanging plates are arranged on the two sides of each evaporating pipe, and the hanging plates are parallel to the fins of the first fin group. The evaporator has the advantages of being good in radiating effect, even in cooling and the like.