To make a better air-land attack tactics decision, an analytical way of air-land attack tactics basing monotonous ability space is presented in this thesis. By air-land attack tactics decision index analytical model which based monotonous ability space, the demand locus and sensitivity of decision index are analyzed. By means of simulation test, this way can reflect attack tactics decision index change following combat course intuitionisticly. And air-land attack tactics decision can also be quantized by it.