NOVELTY - A heating system of single crystal furnace, comprises upper heater (1) and lower heater (2) installed in furnace body, where heaters are respectively opposite to upper part and lower part of crucible (3) and respectively connected with power supply system, where heaters are respectively in square wave shape, where a gap is installed between lower end of upper heater and upper end of lower heater, where vertical height of upper heater is larger than that of lower heater. The gap is provided with thermal baffle (5) stretching into the crucible.    USE - As heating system of a single crystal furnace (claimed) used in semiconductor field, integrated circuit, in solar cell production process and in solar energy field.    ADVANTAGE - The system efficiently uses sectional type combined heaters and a double power supply system, where the double heaters greatly shortens the silicon melting time when melting the material. The system reduces the temperature difference between the top part of the traditional heat field and the bottom part.    DETAILED DESCRIPTION - A heating system of single crystal furnace, comprises an upper heater (1) and a lower heater (2) installed in the furnace body, where the upper heater and the lower heater are respectively opposite to the upper part and the lower part of a crucible (3) and respectively connected with a power supply system, where the upper heater and the lower heater are respectively in square wave shape, where a gap is installed between the lower end of the upper heater and the upper end of the lower heater, where the vertical height of the upper heater is larger than that of the lower heater, where the gap between the lower end of the upper heater and the upper end of the lower heater is provided with a thermal baffle (5) stretching into the crucible. The side walls in the upper part and the lower part of the crucible are respectively provided with a temperature probe respectively electrically connected with the control unit of the upper heater and the lower heater power supply system. The inner side walls of the upper heater and the lower heater are respectively fixed with multiple anti-convection plates made of heat-resisting material.    DESCRIPTION OF DRAWING(S) - The figure shows schematic diagram of the system.    Heater (1)    Lower heater (2, 4)    Crucible (3)    Thermal baffle (5)    Anti-flow plate (6)