The invention relates to a launching power regulation method saving the wireless node energy consumption, which belongs to the wireless communication technology field. The method comprises the following steps: sending nodes transmit N data packets to receiving nodes; the packet-receiving ratio q can be worked out according to the confirmation frames quantity; when the packet-receiving ratio q is bigger than the preset lower limit qt, if the launching power p is Pmin, the operation is over; if the P is not the minimum value, the P value can be lowered, and the packet-receiving ratio q can be worked out according to the confirmation frames quantity; if the packet-receiving ratio q is lower than the preset lower limit qt, and the current P is not the maximum value, the P can be heightened, and the operation is over; the packet-receiving ratio q is lower than the preset lower limit qt, and the current P is Pmax, and the packet-losing ratio under the temporary storing current launching power is qmax; sending nodes can lower P and transmit the N data packets to the receiving nodes; the packet-receiving ratio q can be worked out according to the confirmation frames quantity; if the packet-receiving ratio q is not lower than the r*qmax, the new packet-receiving ratio q can be worked out according to the confirmation frames quantity; if the packet-receiving ratio q is lower than the r*qmax, the P is stopped heightening. The method can ensure that the wireless node can meet the least energy consumption application requirements, thus effectively prolonging the service life of the wireless node.