How to Crochet the Block Stitch step by step. There are just some crochet stitches that are show stoppers. The block stitch is definitely one of them! I love the modern look and the versatility of this stitch depending on which colors you use. There are a few great tutorials online for how to crochet the block stitch, and I’ve noticed that there’s a couple of different ways to do it. Today I want to show you the method that I prefer.