The invention discloses a convenient and fast installing structure for ceiling lamp light source assemblies. The convenient and fast installing structure for the ceiling lamp light source assemblies comprises a base and the light source assemblies; the upper end of the base is provided with an installing plate; the front end and the rear end of each light source assembly are each provided with a connection terminal; the installing plate is provided with a plurality of installing holes used for being connected with the connection terminals in a matched manner; by forming the plurality of installing holes used for being connected with the connection terminals in the matched manner in the installing plate in advance, a user can select the light source assemblies of a proper number to be installed as required and can also install the light source assemblies in the installing holes at proper positions as required, installing of the light source assemblies is convenient and fast, and the using convenience is greatly improved.