Aiming at the problem that a few of solutions about military reconnaissance or interference detect, low calculation speed of current algorithm and low correctness, put forward a radio signal quick find method by using convolution neural network. The method uses convolution neural network in radio detecting field, and realizes signal quick searching by data pretreatment, parameter training, and signal matching. The test results show that the method is fast, at the same time the search accuracy is about 98%, and effectively reduce the dependence on the complex parameters of the signal. Test results also indicate the great performance in terms of quick search of radio signals.