The invention relates to a soft pipeline installing device. The soft pipeline installing device comprises a handle and a gun pipe; the handle further comprises a holding part and a pressure applying part; an included angle is formed between the holding part and the gun pipe; the holding part and the gun pipe are connected through an arc-shaped rotating corner; the upper end of the pressure applying part is connected to the holding part in a pivoted manner; and the lower end of the pressure applying part rotates within the range of the axis of the gun pipe and the axis of the holding part. When the lower end of the pressure applying part rotates to the axis of the gun pipe, a soft pipeline stretches into the gun pipe along the lower end of the pressure applying part; when the lower end of the pressure applying part moves to the axis of the holding part, the soft pipeline is bent by the pressure applying part; and when the lower end of the pressure applying part is buckled with the holding part, the soft pipeline is clamped in a channel formed by the pressure applying part and the holding part. According to the soft pipeline installing device, by rotating the pressure applying part, pipe bending operation of the soft pipeline can be easily performed, the pipe bending difficulty is greatly reduced, the bent soft pipeline can be hidden in the channel formed by the holding part and the pressure applying part, deformation of the soft pipeline is avoided, and the pipe bending effect is improved.