Deep foundation pit anchor cable grouting construction method

The invention relates to the technical field of anchor cable construction, in particular to a deep foundation pit anchor cable grouting construction method. Comprising the following construction steps that drilling is conducted on a preset construction surface, the drilling surface is leveled and cleaned, after drilling is conducted, an anchor cable is placed into a hole, a grouting pipe is inserted, concrete is poured into the bottommost part in the hole, the concrete is waited to be solidified, tensile stress treatment is conducted on the anchor cable, and then concrete is integrally poured into the hole. And after the concrete in the hole is solidified, the anchor cable mounting fixing seat is fixed at the hole opening. The grouting pipe is directly inserted into the bottom of a hole, the grouting pipe is pulled out while grouting is conducted, the grouting uniformity is guaranteed, grouting solidification is conducted at the bottom firstly, foundation support is provided for conducting tensile stress trea