1. A bubble lamp for decoration, comprising a bubble tube (1) and a heating bulb (2) which are used cooperatively, wherein the bubble tube (1) is a glass tube and is sealed; low-boiling-point liquid is further injected into the bubble tube (1); the heating bulb (2) comprises a lamp holder (21), a bulb shell (22), and a heating light source (23); the bulb shell (22) is fixedly connected to the lamp holder (21); the heating light source (23) is electrically connected to the lamp holder (21); the heating light source (23) is electrified to generate heat and promotes the low-boiling-point liquid (11) inside the bubble tube (1) to be boiled and generate bubbles; the bubble lamp for decoration further comprises a catalyst layer (12) configured to assist the low-boiling-point liquid (11) in generating the bubbles; and the catalyst layer (12) is fixedly arranged at one end of an inner side of the bubble tube (1) facing the heating light source (23); wherein the catalyst layer (12) is a mixture of sodium silicate and glass splinters.