Screen printing machine

The utility model discloses a screen printing machine which comprises a feeding and discharging mechanism, a conveying mechanism and a drying oven mechanism which are sequentially arranged in the transverse direction, and a printing mechanism is further arranged above the conveying mechanism. Wherein the feeding and discharging mechanism comprises a lifting space, a lifting device is arranged around the lifting space, the lifting device comprises a plurality of chains, a plurality of supporting strips are arranged on the chains, and a first feeding air cylinder is arranged at the top of each chain; the drying oven mechanism comprises a drying oven, a descending device is arranged in the drying oven, and the structure of the descending device is the same as that of the lifting device; a feeding channel is arranged above the conveying mechanism, a return channel is arranged below the conveying mechanism, a forward conveying belt and a return conveying belt are arranged on the feeding channel and the return chan