Precast lattice girder

A precast lattice girder comprises a latticed girder body with a reinforced concrete structure. Cross girders and longitudinal girders are coordinately intersected to form the latticed girder body. Connecting bolt holes for connecting the girder body with adjacent precast lattice girders are formed in four sides of the girder body, vertical notches for pouring shrinkage-free cement mortar are formed in four corners of the girder body, and embedded connection reinforcing steel bars are arranged in the vertical notches. The precast lattice girder has the advantages of large scale and standardization and can greatly solve the problems of high construction difficulty and resource consumption, low production efficiency and unstable quality caused by a traditional cast-in-place lattice girder, an electronic plant is built with the precast lattice girder, the number of employees is decreased, consumption of energy resources is reduced, labor production efficiency is improved, and the precast lattice girder has quite