Piston-skirt screen printing film thickness measuring instrument and measuring method thereof

The invention discloses a piston-skirt screen printing film thickness measuring instrument and a measuring method thereof. The instrument comprises a pedestal, the upper end of the pedestal is provided with a left-right translation slide block and a slide block driving mechanism, the upper end of the left-right translation slide block is connected with a rotary guiding liner seat, the rotary guiding liner seat is provided with a piston connecting fixed rotating shaft, one end of the piston connecting fixed rotating shaft is provided with an adjusting mechanism which includes a telescopic adjustment mechanism and a rotary adjusting mechanism, the other end of the piston connecting fixed rotating shaft is connected with a piston, a slide rail fixed vertical block is arranged on the pedestaland provided with a slide rail, an elevating slide block is arranged on the slide rail and provided with a probe fixing plate, probe fixing plate is used to fix a probe of the thickness measuring instrument, the elevating sli