The invention discloses a 0/90 degree orthotropic compound machine for UD (Unidirectional) cloth. The 0/90 degree orthotropic compound machine comprises an orthotropic compound mechanism, wherein the orthotropic compound mechanism comprises a transverse UD cloth mechanism and a longitudinal UD cloth mechanism; the transverse UD cloth mechanism comprises a conveyor belt; the conveyor belt is divided into three parts including a cutting-off region, a buffering region and a compound region in sequence; a feeding pinch roll is arranged at the left end of the cutting-off region; a transverse unreeling mechanism is arranged below the left side of the feeding pinch roll; a cutting-off mechanism is arranged above the right end of the cutting-off region; the longitudinal UD cloth mechanism is arranged above the compound region; the longitudinal UD cloth mechanism comprises a longitudinal UD cloth treatment mechanism and a longitudinal UD cloth conveying mechanism. According to the 0/90 degree orthotropic compound machine for the UD cloth, the transverse UD cloth mechanism with the buffering region and the independent longitudinal UD cloth conveying mechanism are designed, so that continuous orthotropic compound machining is realized; the longitudinal UD cloth treatment mechanism is designed, so that influences, caused by tension change of a base material UD cloth on compound quality, are avoided, and the 0/90 degree orthotropic compound machine for the UD cloth is worthy of being greatly popularized.