We demonstrated a facile solution process guided by the conical fibers array（CFA）， based on which bulky polydiarylfluorene（PODPF） were oriented on substrate. After thermal annealing at ca. 240 ℃， PODPF changed from the amorphous-phase to compact π-π stacking β-phase， leading to a PODPF film with higher orientations and larger crystallized sizes. It is proposed that the CFA enables finely controlling the wetting and dewetting processes under directional stress， guiding the disorganized polymer transform into orientation. Using the as-prepared PODPF films as the active layer， a polymer light-emitting diodes（PLEDs） device was developed， which exhibited higher current efficiency of 1.53 cd/A（5.6 V） and more stable electroluminescence compared with that of the spin-coating one. We envision that the as-developed approach offers new inspiration for fabricating high-performance polymer films.