The invention relates to a high-safety multi-level encryption and authentication type WIA-PA network handheld device communication method. The WIA-PA network includes a gateway, a routing device and a field device. The handheld device can be in safe communication with devices in the WIA-PA network in two ways. In the first way, point-to-point communication is established between the handheld device and the devices in the WIA-PA network, and encryption is performed in the link layer. In the second way, the handheld device is joined into the WIA-PA network, and the handheld device is in communication with the devices in the WIA-PA network through the multi-level encryption technology after the handheld device is joined into the WIA-PA network. Through the combination of the two ways, the safety can be ensured, and at the same time, communication is fast established between the handheld device and the devices in the network, and advantages of low power consumption, fast speed and less network performance influences can be realized.