The present invention relates to an integrated processing machine for positioning, trimming and punching of the ceiling splicing structure, comprising a rack and a mounting base for processing at the lower part of the rack, which is provided with a lifting and clamping device passing through the rack cooperating with the splice plate, the upper part of the rack is provided with a processing port, which cooperates with a trimming and positioning device, the trimming and positioning device comprises a lifting cylinder for trimming and positioning disposed on the mounting base for processing, the lifting cylinder for trimming and positioning is connected with a mounting base for trimming and positioning, the mounting base for trimming and positioning is provided with a first trimming knife and a second trimming knife which cooperates with the two splice plates respectively, and the mounting base for processing is provided with a processing mechanism matching with the processing mating port and cooperating with two splice plates; In the present invention, the trimming and positioning device and the processing device are designed to cooperate with each other, the trimming and positioning device is able to complete the trimming of the side slits of the splice plates while positioning the two splice plates without interfering with the operation of the hole and groove processing device, which greatly improves the efficiency of integrated processing.