The utility model relates to a kind of large-span steel truss positioning installation jig frame, it includes: conversion beam, multiple roots are interval arranged between;Stand, interval installation is set on conversion beam;Crossbar, it is horizontally installed between two stand;Horse path bracket, it is horizontally installed in the two sides of stand;First horse path beam, interval installation is set on horse path bracket;Steel pull net, it is laid on first horse path beam;
Cushion beam, it is horizontally installed on the upper end of stand;Backing plate, it is respectively installed on
cushion beam and crossbar;Baffle, it is installed in the two sides of backing plate;First galvanized steel
pipe, it is installed on the first horse path beam of side side;Temporary stair, first channel steel is installed in its upper front side, the first channel steel sliding
assembly is on first galvanized steel
pipe, and foot
brake wheel is installed in its bottom four corner positions.The utility model is favorable for construction personnel flexible work, can choose construction position along jig frame longitudinal direction, and various appliances required for construction are flexibly transported.