The utility model provides an abnormal shape cigarette letter sorting system, the technical field who belongs to cigarette sorting, the PLC controller that includes the control system flow in the system, the tabacco barn that sets gradually according to the assembly line order, the abnormal shape cigarette goes out cigarette mechanism, abnormal shape cigarette conveying mechanism, cigarette appearance guiding mechanism, marking mechanism and letter sorting and packagine machine construct, it becomes the supplementary benefit cigarette conveyer belt that heterotypic cigarette stored up the position with the help of spacing prism to add the surface in the system architecture, the supplementary output end of mending the cigarette conveyer belt is connected with heterotypic cigarette conveying mechanism, should supplementaryly mend cigarette conveyer belt end still is provided with first correlation switch, the signal output part of first correlation switch and the signal input part of PLC controller are connected, the supplementary controlled end of mending the cigarette conveyer belt is connected with the control end of PLC controller, spacing arris is setting up is side by side assisting the spacing arris on mending the cigarette conveyer belt right, is every interval to between the spacing arris of spacing arris centering 40 80mm. The utility model discloses still provide with this form a systematic set's control method, the simply easy operation of this system, efficient to the letter sorting of heterotypic cigarette, ensure a cigarette exactness.