The invention discloses a special-shaped hyperbolical flower pattern dome structure and a construction method thereof. The flower pattern dome structure comprises a main beam structure body and a vice beam structure body used for reinforcing. The main beam structure body comprises high-strength columns, hyperbolical main beams, single curved main ring beams and petal main beam structure bodies, wherein the high-strength columns are evenly connected to rigid connection embedded parts at intervals in the circumferential direction, the hyperbolical main beams with the two ends being connected with the high-strength columns are erected in a crossed mode in pairs, the single curved main ring beams which are connected to the ends of the hyperbolical main beams and closed in the circumferential direction, and the petal main beam structure bodies are erected in a polygonal space formed by the hyperbolical main beams. The integrity of each petal main beam structure body is in a petal shape, and each petal main beam structure body comprises single curved main ring beam bodies erected inside the polygonal space, hyperbolical inner petal main beams erected inside the single curved main ring beam bodies, hyperbolical outer petal main beams erected outside the single curved main ring beam bodies and connection main beams erected between the hyperbolical outer petal main beams and the hyperbolical main beams. According to the special-shaped hyperbolical flower pattern dome structure and the construction method thereof, the problems that an existing dome component is large in quantity and weight, too simple, single in stress form and poor in destruction bearing capacity are solved.