1. Make the first stitch by sending the needle up from the back and then sending it down one stitch length to the back.
2. Then, send the needle up through the middle of the previous stitch you just made.
3.&4. Send the needle back down again the same stitch length and repeat the steps.
5. End your last stitch by inserting the needle down to the fabric close to the last stitch.
6. A row of split stitches is done.
Two-color split stitch
Thread the needle with two colors. Splitting the stitches with the above mentioned method but always keep one color above the needle and the other below.
If you wish to make a very fine line with two-color split stitch, you can thread the needle with two or four strands (even number) of embroidery floss so they split evenly while stitching.