The invention relates to a miniature direct twisting machine for twisting outer yarn and inner yarn into yarn. The miniature direct twisting machine comprises a stand and components which are respectively mounted on the stand, i.e. motors, spindles, an outer yarn tensioner, an inner yarn tensioner, a uniform twisting device, an overfeeding device and a coiling device, wherein the motors are respectively arranged at both sides of the direct twisting machine and drive all the spindles to rotate through a tangential belt, the spindles are used for driving the outer yarn to rotate to form an air ring and respectively comprise a spindle rod, a spindle whorl, a paraphysis tray and a yarn tank, the outer yarn sequentially passes through the outer yarn tensioner, the spindle rod and the paraphysis tray and enters the uniform twisting device, the yarn tank comprises a truncated cone part with conicity, a cylindrical part arranged at the upper end of the truncated cone part and a tank hood sleeved on the cylindrical part, the inner yarn tensioner is mounted outside the tank hood, the inner yarn is arranged in the yarn tank, enters the uniform twisting device through the inner yarn tensionerand is twisted into yarn together with the outer yarn, the overfeeding device is arranged at the upper part of the uniform twisting device, and the yarn is coiled on the coiling device through the overfeeding device.