Heat supply system based on direct connection-partition mode switching and operation adjusting method

The invention relates to a heat supply system based on direct connection-partition mode switching and an operation adjusting method. The heat supply system comprises a water supply main pipe which is provided with a first partition stop valve, a water return main pipe which is provided with a second partition stop valve, the water supply main pipe and the water return main pipe jointly forming a water supply and return loop, and the first partition stop valve and the second partition stop valve dividing the water supply and return loop into the upstream portion and the downstream portion, a first bypass pipe which is arranged on the upstream portion of the water supply and return loop and used for communicating the water supply main pipe on the upstream portion with the water return main pipe, an adjusting valve set being arranged on the first bypass pipe; and a second bypass pipe which is arranged on the downstream portion of the water supply and return loop and used for communicating the water supply main p