NOVELTY - A north biogas anaerobic fermentation combined heating system comprising a biogas fermentation solar heating system (15) comprising solar heat collector (1), heat exchanger (2), heat exchanger return tube (3), biogas fermentation device (12), raw material pre-heating heater (13), and water box (14), is new.    USE - The north biogas anaerobic fermentation combined heating system is useful for installation and use of biogas fermentation device in high and cold areas.    ADVANTAGE - The north biogas anaerobic fermentation combined heating system has simple structure, convenient operation, high task quality, reliable usage and less fault, it is particularly suitable for the installation and use of biogas fermentation device in high and cold areas, with strong adaptive capacity.    DETAILED DESCRIPTION - A north biogas anaerobic fermentation combined heating system comprising a biogas fermentation solar heating system (15) comprising solar heat collector (1), heat exchanger (2), heat exchanger return tube (3), biogas fermentation device (12), raw material pre-heating heater (13), and water box (14), where the combined heating system further comprises a biogas fermentation wind power generation heating system (16) comprising aero-generator (7), storage battery (8), inverter (9) and electric heater (10), where the aero-generator and storage battery, storage battery and inverter, and the inverter and the electric heater are connected respectively by the first lead (17), the second lead (18) and the third lead (19); the two ends of water outlet tube (11) of the electric heater are respectively connected with water outlet of the electric heater and water inlet of the water box, the two ends of return tube (6) of the electric heater are respectively connected with water outlet of water box and water inlet of electric heater, is new.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the north biogas anaerobic fermentation combined heating system.    Solar heat collector (1)    Heat exchanger (2)    Heat exchanger return tube (3)    Electromagnetic switch valve A (4)    electromagnetic switch valve B (5)    Return tube (6)    Aero-generator (7)    Storage battery (8)    Inverter (9)    Electric heater (10)    Water outlet tube (11)    Solar heat biogas fermentation device (12)    Raw material pre-heating heater (13)    Water box (14)    Biogas fermentation solar heating system (15)    Biogas fermentation wind power generation heating system (16)    First lead (17)    Second lead (18)    Third lead (19)