In view of the dense deployment of bluetooth mesh network nodes and the influence of metal materials on the wireless signal transmission of the bluetooth antenna, improves the gain of the bluetooth antenna through changing the shape of inverted-F antenna radiation arm, so as to achieve the purpose of using bluetooth mesh network node to transmit wireless signals in long-distance, while ensuring that the surrounding metal materials will not affect the transmission of bluetooth wireless signals, reducing signal energy loss and realizing the long-distance deployment of bluetooth mesh network nodes. These two bluetooth antennas have the characteristics of miniaturization, high gain and high bandwidth, and cover the entire ISM frequency band of bluetooth communication. The HFSS was used to simulate and analyze the characteristics of the bluetooth antennas, the optimized structural parameters of the bluetooth antennas were obtained. The real bluetooth antennas were manufactured, and the experiment tests were conducted. The experiment results show that the return losses of the folded antenna and spiral antenna are both less than - 10 dB, and the bandwidths completely cover the bluetooth frequency band; moreover, the performance of the spiral antenna is better, its gain reaches 4. 6 dB, and the farthest transmission distance in a metal environment is 20 m.