Hidden skirting line grooving machine and application method thereof

The invention relates to a hidden skirting line grooving machine which is mainly composed of two transverse cutting wheels, a vertical cutting wheel and a machine body and comprises a main body structure and a transmission system. The main body structure comprises an upper horizontal cutting wheel, a lower horizontal cutting wheel, a machine body, a vertical cutting wheel, a vertical cutting wheel baffle, a main power shaft and an electric motor; the transmission system comprises a driving shaft spiral gear, a driven shaft rear spiral gear, a driven shaft, a driven shaft front spiral gear, an upper cutting wheel shaft, a lower cutting wheel shaft and upper and lower spiral gears; the upper horizontal cutting wheel and the lower horizontal cutting wheel are located on the upper part and the lower part of the front end of the machine body respectively; the vertical cutting wheel is located on the side part of the rear end of the machine body; the main power shaft and a middle shaft of the electric motor are int