The invention discloses a mahjong mat bamboo chip processing and roasting device guaranteeing the processed bamboo chips having no color differences. The device is characterized by including steps of feeding, primary heating, dehumidifying and drying, heating in an advanced manner, coloring preparing, coloring, color determining, cooling naturally, and coloring completing. The device comprises a frame; the frame is provided with a cylinder driven by power to rotate, a heating mechanism, an air exchange mechanism exchanging the air inside and outside the cylinder and a control mechanism; the radial section of the cylinder is a regular pentagon or hexagon or heptagon or octagon; the side wall of the cylinder is provided with the inlet and outlet; the cylinder is provided with a temperature sensor; the control mechanism controls the power, heating mechanism and the air exchanging mechanism according to the temperature detected by the temperature sensor. The method can be implemented, the occupation is small, occupation of large amount of fields for bamboo chip basking is omitted, the method is environment-friendly, chemical additive adding can be avoided, finished products are free of toxic, operation and control are easy, color is modulated evenly, full automatic control can be implemented, the bamboo chips made of different materials are colored consistently, manual sorting is omitted, the product qualified rate is increased, and labor cost is saved.