The utility model relates to a support dental treatment unit (11, 31) interior one or more functional module and dental appliance's modular structure. The functional module is: water route unit (12, 32), this water route unit is including the casing partly at least that is used for holding the partly at least of electric installation, the pneumatic facility of electronics and hydraulic pressure facility and control processing unit, dentist's board (15, 35), basin pond (14, 34), assistant's board (16, 17, 37), operation lamp (18, 38), the display screen, and radiography device in the oral cavity, bearing structure is vertical pole (1), and the part festival section of this vertical pole is circular cross section and includes two at least parts: go up extend portion and lower basilar part branch (111).
