LED (Light Emitting Diode) light source module and street lamp cap base body

The invention provides an LED (Light Emitting Diode) light source module which is easy to replace and high in reliability, and a lamp cap base body which is used together with the module. The LED light source module comprises an LED luminous chip, an aluminum substrate, a circuit layer, a cover protection part and a power supply input interface part; the aluminum substrate is strip-shaped; the cover protection part is covered on the surface of the LED luminous chip of the aluminum substrate; a light distributing concave part is arranged on the cover protection part; an elastic hook part is also arranged on the cover protection part; an inserting direction of a power supply input interface part is parallel to a length direction of the aluminum substrate; the power supply input interface part is fixed on the aluminum substrate and positioned at one end in the length direction of the aluminum substrate; the elastic hook part is positioned at the other end in the length direction of the aluminum substrate. The invention also provides a street lamp cap base body which is applicable to the LED light source module. The LED light source module has the advantages of being reasonable in structure and convenient to assemble and disassemble; and the street lamp cap base body has the advantages of being free of tool maintenance, and convenient and quick to repair and maintain.