The invention discloses an LED lamp filament component, a method for making an LED lamp filament bulb and an LED lamp filament bulb. The LED lamp filament component comprises one or more LED lamp filaments (1.1) provided with electric connection terminals (1.3) at the two ends, and the electric connection terminals (1.3) at the two ends of the LED lamp filaments (1.1) are connected with two heat conducting and electric conducting terminal supports (1.4) respectively. By the adoption of the LED lamp filament component, the light out-coupling efficiency of an LED can be improved, and heat dissipation efficiency can be improved. By the adoption of the method for making the LED lamp filament bulb and the LED lamp filament bulb, the limitation that a heat dissipation device is required for an existing LED illumination lamp is broken, a high-power LED filament lamp light source can be obtained to directly replace an existing high-power lighting product light source, and lamp replacement is not needed.