The invention discloses an LED star sky lamp string point light source. The LED star sky lamp string point light source comprises a control board, an LED lamp board, a lamp body, a lampshade, a cableline and a rear cover; a power source parallel connection welding disc and a signal series connection welding disc are arranged on the control board, the cable line comprises a power line and a signalline, the inlet end and the outlet end of the signal line are welded to the signal series connection welding disc, the power line is welded to the power source parallel connection welding disc, the LED lamp board is welded to the control board, the LED lamp board and the control board are both arranged in the lamp body, the lampshade is arranged outside the lamp body, the rear cover and the lampbody are connected in a matched manner, and the cable line is limited. The power source parallel connection welding disc and the signal series connection welding disc are arranged on the control board, and therefore multiple LED point light sources can be in series connection, and single-point control is achieved; through a controller, each point light source is controlled, different changes are generated, and the fantasy effects of characters, patterns, horse racing and the like which are difficult to achieve through a common point light source can be achieved.