1. Start knitting 600 stitches. The purpose of knitting hollow needles is to wear rubber bands until they can pass through them.

2. After knitting the hollow needle, subtract 124 stitches, leaving 476 stitches, knitting 6 stitches, 1 stitch (the number of stitches in pants varies from person to person, so long as it is appropriate). After knitting for half an inch, knit back stitches at the back waist, once every 20 stitches.

3. Needles should be added before and after the vertical crotch, with the rear crotch knitted to 3.5 inches 12-2- 14, the front crotch knitted to 6.5 inches 15-2-6, and the vertical crotch length 1 foot. When there are a few stitches left in the middle, use the knitting in front and subtract it.

4. Then knit the trouser legs and choose 56 stitches from the middle 3 inches. The number of stitches in the trouser leg is 30 1, and the number of stitches is reduced by 4- 1-30. At this time, the middle needle reducing part is triangular, and then the needle is reduced by (5- 1-26)X2, (8- 1-20).