Continuous and multilayer pre-support method of short downward anchor cable

The invention provides a continuous and multilayer pre-support method of a short downward anchor cable. In the method, by starting from a second layer, after one-step mining stripping backstopping, the pre-support operations are conducted as follows: firstly, drilling downwards inclining drill holes along slightly upper positions of two rib bottom plates of one-step mining stripping; mounting support deformed steel bars in the drill holes and pouring cement paste; utilizing the same one rooting deformed steel bar to connect tails of the support deformed steel bars at the same strip in the one-step mining strpping backstopping together; and performing cemented filling in a stope. Milltailings are filled after two-step mining backstopping. By using the method, look-head, continuous and multilayer supports are performed on an orebody to be mined, so that roof falling in the stope can be completely eliminated.