Building template and construction method thereof

The invention belongs to the technical field of building construction equipment, and discloses a building template which comprises an assembling template, upper holes are formed in the two sides of the top of the assembling template, lower holes are formed in the two sides of the bottom of the assembling template, and middle holes communicating the upper holes with the lower holes are formed in the assembling template. The connecting rods are movably arranged in the splicing formworks in a sleeved mode, so that when the splicing formworks are not spliced, the connecting rods are located in through cavities of the upper holes, the lower holes and the middle holes and do not stretch out of the outer surfaces of the splicing formworks, it is guaranteed that the splicing formworks can be tightly attached to one another when stacked, and when the splicing formworks are spliced, firstly, the mounting columns are fixed to the ground, and then the mounting columns are fixed to the ground; and then the lower hole is s