The invention discloses a convenient-to-assemble connecting structure with a stable structure. The convenient-to-assemble connecting structure with the stable structure comprises a connector 1, wherein one end of the connector 1 is equipped with a connecting supporting base 2 which is in split type connection with the connector 1; the connecting supporting base 2 comprises a first connecting bugle2a which can extend into the inner wall of the connector 1; a joint of the first connecting bulge 2a and the connecting supporting base 2 is formed with a first mounting limiting step 201; the outersurface of the first connecting bulge 2a is equipped with a first splicing avoiding slot 203 for allowing the first connecting bulge 2a to conveniently insert into the inner wall of the connector 1; and after the first splicing avoiding slot 203 is connected with the inner wall of the connector 1, so that the first connecting bugle 2a is positioned in the inner wall of the connector 1 and is not liable to deviate. During assembly, the connecting structure is easily positioned, is convenient to assemble, does not deviate during connection, increases the assembly yield, improves the assembly efficiency; and moreover, the connected structure is stable and durable in use.